午夜福利总站-午夜国产-午夜国产爆乳-午夜国产传媒-午夜国产大片-午夜国产福利片-午夜国产福利在线-午夜国产精品福利-午夜国产精品视频-午夜国产理伦

conhecimento

'Its strength is its simplicity' The benefits of cleaning with vinegar.txt

ifxqt

13 Oct 2025(atualizado 13/10/2025 às 00h11)

'Its strength is its simplicity': The benefits of cleaning with vinegarSkip to contentBritish Broadc

Temas

Compartilhe

Could_this_suit_revolutionise_motion_capture.txt'Its strength is its simplicity' The benefits of cleaning with vinegar.txt

'Its strength is its simplicity' The benefits of cleaning with vinegar.txt

'Its strength is jogosda quinaits simplicity': The benefits of cleaning with vinegarSkip to contentBritish Broadcasting CorporationRegisterSign InHomeNewsSportBusinessInnovationCultureArtsTravelEarthAudioVideoLiveHomeNewsIsrael-Gaza WarWar in UkraineUS & CanadaUKUK PoliticsEnglandN. IrelandN. Ireland PoliticsScotlandScotland PoliticsWalesWales PoliticsAfricaAsiaChinaIndiaAustraliaEuropeLatin AmericaMiddle EastIn PicturesBBC InDepthBBC VerifySportBusinessExecutive LoungeTechnology of BusinessFuture of BusinessInnovationTechnologyScience & HealthArtificial IntelligenceAI v the MindCultureFilm & TVMusicArt & DesignStyleBooksEntertainment NewsArtsArts in MotionTravelDestinationsAfricaAntarcticaAsiaAustralia and PacificCaribbean & BermudaCentral AmericaEuropeMiddle EastNorth AmericaSouth AmericaWorld’s TableCulture & ExperiencesAdventuresThe SpeciaListTo the Ends of The Earth EarthNatural WondersWeather & ScienceClimate SolutionsSustainable BusinessGreen LivingAudioPodcast CategoriesRadioAudio FAQsVideoLiveLive NewsLive SportHomeNewsSportBusinessInnovationCultureArtsTravelEarthAudioVideoLiveWeatherNewsletters'Its strength is its simplicity': The benefits of cleaning with vinegar24 April 2025ShareSaveKatarina ZimmerShareSaveGetty Images(Credit: Getty Images)Katarina Zimmer put vinegar to the test as a cleaning product and discovered a wide range of benefits, for people and the planet.A few months ago in my new Berlin apartment, my toilet and I were at war. No amount of scrubbing or toilet cleaner would evict the limescale coating inside. Frustrated, I turned to Google and stumbled across a page recommending vinegar – something that the previous inhabitant had left behind in abundance. After dropping two tablespoons full of "Essigessenz" – essentially concentrated vinegar – into the toilet and waiting for half an hour, I scrubbed and the limescale came off in a moment. Since then, I've enthusiastically used vinegar to rid my world of limescale. I've found it even more effective than my regular kitchen spray cleaner for getting my sink sparkling. That includes the faucet, which I wrapped in a vinegar-soaked kitchen tissue – whereas my regular cleaning spray dribbled off. And rather than having to buy special tablets to clean my limescale-smothered glass kettle, I simply poured two tablespoons of concentrated vinegar inside and boiled it. As the limescale crackled off, it made a satisfying sizzling sound.I wondered if vinegar had other advantages. Did it also kill off bacteria and other germs? And, importantly, was this simple, natural product better for the environment and for my health than regular cleaning products? The internet is full of sustainability influencers and green cleaning blogs that advertise vinegar as a jack-of-all-trades and a safer and "greener" alternative to "toxic" cleaning products. These claims make sense on the surface; vinegar is after all just fermented alcohol and has long been used as a food preservative, in salad dressings, as well as a household cleaner – but I wanted evidence. After interviewing three experts, I learned that while some of these claims are true, the benefits of vinegar depend a lot on how it's used and the kind of grime you're trying to get rid of.Getty ImagesLimescale dissolves more easily in acidic fluids like vinegar (Credit: Getty Images)Reassuringly, Eric Beckman, a chemical engineer and emeritus professor at the University of Pittsburgh in Pennsylvania, told me that the best cleaning use for acetic acid – the main component of vinegar – is exactly what I had been using it for: as a descaler. Limescale – and rust, for that matter – consists of certain ions that dissolve more easily in acidic fluids like vinegar, he says. Beckman uses vinegar himself to get limescale off mirrors, while the microbiologist Dirk Bockmühl of Germany's Rhine-Waal University of Applied Sciences prefers using lemon juice, which contains citric acid, which he says is a more effective descaler and smells better. (Read more about why vinegar is such an effective cleaner.)That said, vinegar doesn't work on everything. Beckman says that soap does a better job at removing oily films on dishes, while baking soda is effective against processed oils that have stuck onto surfaces while cooking. (Read more about whether baking soda is environmentally friendly).However, Beckman expresses exasperation about a popular remedy of mixing vinegar together with baking soda. The mixture is chemically quite useless, he says, as the acid of vinegar and the base of baking soda effectively cancel each other out. "I use both, but not together," says Beckman. "Together, they give you nothing."   And while vinegar is often touted as a powerful antimicrobial, Bockmühl says, the truth is more nuanced. In a 2020 study, Bockmühl and his colleagues put vinegar to the test against a selection of disease-causing bacteria, viruses and fungi. While many internet recommendations suggest adding a dash of vinegar into a bucket of water for cleaning, Bockmühl found that its anti-microbial effects only kick in at an acetic acid concentration of 5% – its concentration in pure vinegar. And it was only fully effective at distilled concentrations of 10%  – to which the researchers added a dash of citric acid – in killing off five common bacteria, including Escherichia coli and Staphylococcus aureus, as well as a mould, a yeast and a weakened strain of the vaccinia virus. Other studies have found that similar concentrations also work against Sars-CoV-2, the virus that causes Covid-19.  But even these concentrations didn't work against the MRSA bacterium, an especially stubborn strain of Staphylococcus aureus that's resistant to certain antibiotics, while countless bacteria remain untested. Many bacteria – including the ones that ferment alcohol into vinegar – thrive in acids, Beckman adds: "Then they'll be like, 'ooh, yay, vinegar.'" Some moulds, too, are resistant to acetic acid while some viruses – like norovirus – might be, too, Bockmühl suspects. Beckman says that soaps are more effective against bacteria, while standard disinfectants work better against viruses and moulds. Harsh treatments like bleach will definitely kill everything, Beckman says – although bleach can be unsafe if used incorrectly.Getty ImagesVinegar is less effective against processed oils that have stuck onto surfaces during cooking (Credit: Getty Images)Bockmühl stresses that, even for the germs that vinegar does kill, a relatively high concentration is needed. The concentration won't be adequate "if you just put a teaspoon of vinegar into your cleaning solution", Bockmühl says. However, the higher the dose of acetic acid, the more irritating it can be on the skin, he adds. It is harmful if it gets into your eyes. Surfaces can suffer, too: vinegar corrodes natural stone and metals like copper, bronze and brass, according to the Italian chemist Dario Bressanini's book The Science of Cleaning. And in dishwashers or washing machines, it can harm the rubber gaskets used to seal them, while it could also damage coffee machines and strip away the coating on tiles and grout, Bressanini writes. But Bockmühl assures me that it's fine to use vinegar on glass and ceramic surfaces – like my toilet – and stainless steel sinks.The trouble that Bockmühl sees with using homemade cleaning products is that they don't come with instructions or safety recommendations. "They might be safe if you know what you're doing," he says, "but there are a lot of really stupid and absurd recommendations on the internet".More like this:? Are you cleaning your water bottle enough?? Why you might want to change your bedclothes more often? Seven proven ways to help the planet in 2025 To learn more about how the health risks of vinegar compare with those of conventional cleaners, I called up Nicola Carslaw, professor of indoor air chemistry at the University of York in the UK. Her concern is how cleaners disrupt the air in our homes and buildings. It's known that professional domestic cleaners tend to have higher rates of asthma than other occupational groups, although it's proven difficult to pin that on any single product or ingredient.In a recent study, Carslaw and her colleagues tested 23 different cleaning products including dishwasher fluid, washing up liquid and spray products, and found that many of them released volatile chemical compounds (VOCs). Some of these compounds, like terpenes, are often added to give pleasant aromas, such as lavender or pine oil, but they're highly reactive in the atmosphere. Terpenes for instance, easily react with ozone in the air, creating miniscule particles. In general, inhaling particles of this size has been linked to lung and heart disease."Your nose is a really good filter for the big particles, but the smaller ones can get all the way into your lungs [and] into the bloodstream," Carslaw says. Interestingly, in her study she found that cleaning products marketed as "natural" or "green" didn't seem any healthier in this regard. "The natural/green ones had as many, if not more VOCs as the standard cleaners, and in many cases they were more reactive," she says.Vinegar passes muster on any sustainability scale because it's simple and it's degradable – Eric BeckmanBut vinegar, by contrast, only consists of water and acetic acid (and a few other substances that make the difference between red and wine vinegar, for instance). As such, "it's just not going to be chemically reactive in the same way", Carslaw says. Another advantage of vinegar is that it's usually applied on a cloth to wipe surfaces rather than used as a spray, Carslaw adds. Research shows that cleaning products applied in spray form have more harmful effects on the respiratory system than liquids and wipes. (Read more about the health risks associated with cleaning products in Jessica Bradley's story). "When you spray something, you're turning the chemical into a form that's much easier to breathe [in] than if you have the liquid," Carslaw says. That said, she always advises gloves when there's risk of skin contact, good ventilation and avoiding excessive cleaning, whatever product is used. (Read more about whether we're cleaning too much for our own good).Getty ImagesVinegar quickly breaks down and therefore its environmental impact is low (Credit: Getty Images)This all left me with one remaining question: is using vinegar more environmentally friendly than conventional cleaners? That's a hard question to answer, says Beckman. Ideally, there would be life cycle analyses for cleaning products which track impacts from cradle to grave, tracing each ingredient back to its source, how it's produced, transported, packaged and eventually disposed of. But very few companies do that thoroughly, even if they do brand their products as "green", Beckman says. "But I will say this about vinegar. [Its] strength is its simplicity," Beckman says. Conventional cleaners can consist of more than a dozen different ingredients, many of them industrially manufactured in energy-consuming processes, he says. Acetic acid is born through the natural, yeast-driven fermentation of alcohol, which itself comes from the natural fermentation of sugar. The biggest environmental impact of vinegar-making is where the sugar came from – whether it's grapes, apples, grains, potatoes, or rice – which are largely renewable resources. Bockmühl cautions that this only applies to naturally fermented vinegars, the ones typically sold as food products; there are also synthetic vinegars which are derived from fossil fuels, meaning they come with all the environmentally harmful impacts of oil and gas extraction.  Even at the very end of its life, vinegar has little impact. While many ingredients in soaps are tough molecules and don't easily biodegrade, sometimes continuing to kill organisms once they're in the environment, vinegar quickly breaks down, Beckman says. "Vinegar passes muster on any sustainability scale because it's simple and it's degradable," he says. After discovering all of this, I felt even better about using vinegar. I probably won't rely on it for ridding my surfaces of germs, but I'll keep using it to remove limescale and look forward to trying it out on the next rusty item I find. I'm happy to put up with the smell, knowing that I'm using a sustainable product that's likely better for my health. --For essential climate news and hopeful developments to your inbox, sign up to the Future Earth newsletter, while The Essential List delivers a handpicked selection of features and insights twice a week.For more science, technology, environment and health stories from the BBC, follow us on Facebook, X and Instagram.EarthSustainability on a ShoestringHygieneHealthSustainabilityEnvironmentClimateScienceFeaturesWatchExplaining how a touchscreen works with a sausageBritish mathematician Hannah Fry digs into the science of touchscreens.4 Aug 2025ScienceSeven images that transformed our world viewWatch how the maps and images of our planet from above have changed over the last two millennia.30 Apr 2025EarthTen striking images of an Earth scarred by humansFrom a shipwrecking yard in Bangladesh to a river of iron dioxide in Canada, a deep dive in Ed Burtynsky's work.16 Apr 2025EarthWhat's inside a black hole?Black holes are one of the mysteries of the universe where all the laws of nature as we know them stop working.9 Apr 2025ScienceUsing bubbles to remove forever chemicals from our waterBBC Click visits a UK research team working on a solution to remove toxic chemicals known as PFAS from water.27 Mar 2025ScienceHow sex with Neanderthals changed us foreverWe find out what we gained when Homo sapiens mated with Homo neanderthalensis many thousands of years ago.18 Mar 2025ScienceTheory of Evolution: How did Charles Darwin come up with it?The British naturalist embarked on an extraordinary journey, did hundreds of experiments, and wrote for 20 years.12 Feb 2025ScienceRaja the elephant asking for a road tollIn Sri Lanka, a charming elephant cheekily halts traffic for treats. 29 Jan 2025EarthInside the hidden world of rhino romanceWatch two rhinoceroses involved in a game of 'kiss and chase'.24 Jan 2025EarthThe power of hugs for reducing inflammation in the bodyDr. Lisa Dahlgren discusses the effect human touch has on our health and wellbeing.22 Jan 2025HealthA mother tiger on a fierce hunt to feed her cubsWhile her three offspring take a leisurely bath, this Bengal tiger mother must find food for the entire family.16 Jan 2025EarthHow foxes outsmart world's heaviest raptor in quest for foodWatch red foxes challenge the Steller's sea eagle, the world's heaviest raptor, as they search for food in Japan.8 Jan 2025EarthHomo juluensis: Possible 'new ancient human' identifiedResearchers may have identified a new human species that lived around 300,000 years ago in Asia.6 Jan 2025ScienceMum saves baby seal with a clever trickWatch as David Attenborough reveals the unique behaviour of a mother seal to protect her pup in icy waters.31 Dec 2024EarthHow Arctic communities protect themselves from avalanchesBBC Click finds out how local communities in Svalbard use technology to combat avalanches and heavy snowfall.31 Dec 2024ScienceMountain goats: A death-defying battle to mateWatch the world's largest species of goat fight for the right to mate, teetering on the edge of perilous drops.17 Dec 2024EarthThe near miraculous escape of a cave swiftThe Tam Nam Lod Cave is home to over a quarter of a million swifts. But there are hidden dangers.12 Dec 2024EarthMeet the mudskipper: The remarkable fish that lives on landThe mudskipper is a fish that can leap with a flick of its tail. Watch a particularly agile specimen in action.3 Dec 2024EarthWatch the dramatic escape of tiny fish from deadly sharksThe Moorish idol, a dramatic little fish with dazzling stripes, adopts a clever strategy to save its life.27 Nov 2024EarthEarth tides: Why our planet's crust has tides tooHow do they differ from the ocean? A geophysicist breaks it down for us.28 Sep 2024Weather & scienceMore from the BBC3 hrs agoFarmer, 37, dies after missing out on new treatment Robin Elcock was unable to access new treatment for brain tumours as he did not have the necessary tissue.3 hrs ago4 hrs agoDementia suits show how tricky daily tasks can beThe simulation suits are helping health staff understand the frustration patients face every day.4 hrs ago4 hrs agoBlood cancer treatments come on 'leaps and bounds'A Wiltshire woman, who is now in remission, says new treatments are also much gentler on the body. 4 hrs ago8 hrs agoPostcode lottery for new cancer treatments, doctors warnExperts say bureaucracy is "stifling innovation" and that applying for funding to pay for new treatments can be "cumbersome".8 hrs ago8 hrs agoDr Xand: Stress is normal. Here's how to manage it betterStress, in small doses, can be good for us. Here are five simple, science-backed ways to manage it better. 8 hrs agoBritish Broadcasting CorporationHomeNewsSportBusinessInnovationCultureArtsTravelEarthAudioVideoLiveWeatherBBC ShopBritBoxBBC in other languagesFollow BBC on:Terms of UseAbout the BBCPrivacy PolicyCookiesAccessibility HelpContact the BBCAdvertise with usDo not share or sell my infoBBC.com Help & FAQsContent IndexCopyright 2025 BBC. All rights reserved. The BBC is not responsible for the content of external sites. Read about our approach to external linking. 

NEWSLETTER GRATUITA

Nexo | Hoje

You_look_fabulous_Reporter_compliments_Zelensky_on_his_suit.txt

Core_Skills_-_Scotland_-_BBC_Bitesize.txt ponto quente e os explorar moda.

GRáFICOS

nos eixos

Your_pictures_on_the_theme_of_monochrome_.txt

Could_eating_ants_help_us_live_longer.txt entretenimento e os enciclopédia ponto quente.

Navegue por temas

Cyber-crime_-_BBC_News.txt Commencement speech The surprising pitfall of your passions.txt Coventry_granddad_91_hires_personal_trainer.txt Cwpan_Rygbir_Byd_y_Merched_Beth_aeth_oi_le_-_BBC_Cymru_Fyw.txt Cycling News, Results & Updates - BBC Sport.txt Conservation_-_BBC_News.txt Cross-border_funding_is_vital_for_our_communities.txt Cycling_Calendar_-_Upcoming_Tournaments_-_BBC_Sport.txt County_Championship_Josh_Tongue_helps_Notts_take_control_at_New_Road_-_BBC_Sport.txt Cycling_News_Results_amp_Updates_-_BBC_Sport.txt
日韩人妻精品久久日 | 热门视频| 亚洲日本无码精品无码白石麻衣 | 青青草a免费线看 | 国产真人性做爰视频免费40分钟 | 久久99久久精品国产99热 | 男女做哎爱过程图片 | 久久久无码精品一区二区三区 | 成人福利免费在线观看 | 国产特黄特级AAAAA片 | 91在线激情在线观看 | 黄色日本网站 | 国产69精品久久久久乱码韩国 | 久久亚洲精品AV成人无码 | 中文国产成人精品久久下载 | 最爱视频在线直播www | 最新国模无码国产在线视频 | 婷婷情色 | 激情小说在线观看 | 雨宫琴音 qvod | 99re久久精品在线播放 | 欧美激情综合五月色丁香 | 少妇饥渴偷公乱AV在线观看涩爱 | 国产成人精品一区二区三区视频 | 在线观看成人A片免费播放 在线观看免费的小电影网站 | 图片区小说区激情春色 | 中文字幕视频在线观看 | 中文乱码一线二线三线 | 久久综合久久鬼 | 亚洲色婷婷免费视频 | 久久这里只精品热在线99 | 亚洲精品卡2卡三卡4卡2卡乱码 | 男人狂躁女人A片免费网站 男人猛躁进女人的毛片A片 | 国产传媒18精品A片熟女 | 青草娱乐极品免费视频 | 国产精品69人妻无码久久久 | 成人欧美一区二区三区白人 | 日韩色情一区二区无码AV | 亚洲中文字幕无码一久久区 | 又大又爽又黄A片免费 | 福利区体验区120秒免费 | 国产又粗又猛又爽又黄A片漫画 | 黑人巨茎大战白人女40CMO | 精品一卡二卡三卡四卡视频区 | 国精产品三区四区有限公司 | 欧美国产大片 | 波多野结衣33分钟办公室jian情 | 国产精品日产三级在线观看 | 99九九热 | 久久婷婷五月综合色丁香花 | 国产人妻精品区一区二区三区 | 夜夜操夜夜骑 | 四虎影视完整版免费观看 | 朋友的爸爸1免费中字翻译 千色成人网 | 又硬又粗进去好爽A片天美APP | 人人澡人人爽人人精品 | 99国产精品久久人妻 | 国产亚洲精品网站在线视频 | 免费精品美女久久久久久久久 | 我就色色综合网 | 疯狂伦交1一6 小说 疯狂揉小泬到失禁高潮在线 | 成 人 网络 | 国产偷抇久久精品A片蜜臀A | 国产50岁熟妇露脸 | 美女扒开下面让男生桶白浆 | 激情电影色影音先锋 | 免费又色又爽又黄的小说软件 | 国产亚洲精品久久久久久国 | 纯肉无码AV在线看免费看 | 色女人综合 | 麻豆传煤网站免费入口ios | 欧美人妻WWW无码国产黄漫 | 三级毛片免费看 | 日本黄线在线播放免费观看 | 成人午夜视频在线观 | 国内外成人色情视频 | 日产中文乱码字幕无线观看 | 性猛交xxxxx按摩中国 | 女人十八毛片A级十八女人 女人十八毛片A片久久18 | 亚洲最新永久在线观看 | 色偷偷亚洲女人天堂观看欧 | 国产超碰AV人人做人人爽 | 欧美高清束缚xxxxhdhd | 日韩操片| 豪妇荡乳1一5杨贵妃 | 国产裸舞福利在线视频合集 | 黄色网址视频在线播放 | 亚洲 第一区 欧美 日韩 | 免费麻豆国产黄网站在线观看 | 日日夜夜精品免费视频 | 老妇乱子伦视频国产 | 欧洲欧美人成视频在线 | 亚洲精品久久久WWW小说 | 精品日本久久久久久久久久 | 日本少妇做爰全过程毛片 | 欧美日韩另类在线 | 四虎家庭影院 | 成人99国产精品一级毛片 | 天美视频在线观看 | 亚洲熟女片嫩草影院 | 免费影院 | 网站在线观看观看免费 | 亚洲精品嫩草AV在线观看 | 日本玖玖视频 | 手机看片91精品一区 | 久久亚洲w码s码 | 免费网站国产 | 性午夜| 色网大全 | 黄色在线免费观看网站 | 国产亚洲精品久久一区二区三区 | 五月婷婷综合色 | 医生别摸啊摁摁 | 免费 电影 | 成人毛片免费 | 国产麻豆乱子伦午夜视频观看 | 学生妹无套内射正在播放 | 国产免费a级片 | 日本视频免费高清一本18 | 麻豆AV字幕无码中文 | 精品一区二区三区的国产在线观看 | 免费视频免费视频 | 欧美日韩激情一区二区三区 | 99久久精品免费看国产高清 | 日本高清WWW色视频网站 | 无码人妻国产一区二区三区 | 亚洲永久网站 | 日本黄线在线播放免费观看 | 激情五月天小说 | 久久久久国产精品免费看 | 九操网 | 日韩一级一欧美一级国产 | 最近中文字幕视频在线2019 | 老司机午夜剧场 | 狠狠色很很鲁在线视频 | 欧美另类性视频在线看 | 美日韩在线 | 久久国产高清字幕中文 | 福利视频导航大全 | 超碰97人人无马 | 伊人久久大香线蕉综合5g | 99在线视频观看 | 欧美精品久久久久久久小说 | 久久精品国产亚洲AV成人 | 欧美一级日韩一级亚洲一级va | 欧美高清第一页 | 他的舌头弄得我爽水好多 | 精品欧美成人高清在线观看2021 | 欧美白虎逼 | 国产精品点击进入在线影院高清 | 无人高清视频免费观看在线下载 | 国产一卡2卡3卡四卡国色天香 | 免费看黄在线网站 | www视频在线观看免费 | 小草影院亚洲私人影院 | 欧美性生交大片免费看A片免费 | 性荡视频播放器在线视频播放 | 久久亚洲精选 | 日日噜噜夜夜狠狠tv视频免费 | 色婷婷国产精品视频一区二区三区 | 免费A级毛片黄A片高清在线播放 | 91免费观看在线网址 | 亚洲最大的熟女水蜜桃AV网站 | 亚洲欧美日韩中文播放 | 天堂中文网 | 变天就草逼 | 欧美亚洲福利 | 日本高清色情高清免费 | 亚洲无线一二三四区手机 | 国产偷拍一极视频 | 国产人妻人伦精品无码.麻豆 | 午夜视频观看 | 日本欧美不卡一区二区三区在线 | 男人狂躁女人A片免费网站 男人猛躁进女人的毛片A片 | 琪琪电影午夜理论片YY6080 | 国产专区_爽死2024 | 午夜激情影院 | 又黄又欲又肉的小说 | 99久久精品免费看国产免费 | 欧美一区二区三区久久综合 | 看av吧| 亚洲欧美自拍另类图片色 | 拍裸戏时被C了H辣文np | 亚洲三级在线中文字幕 | 日本久久精品毛片一区随边看 | 国产成人AV大片大片在线 | 日韩视频福利 | 亚洲a视频在线观看 | 欧美成人猛片AAAAAAA | 伊人久久大香线蕉亚洲 | 亚洲、国产综合视频 | 理在线 | 亚洲 欧洲 日韩 综合在线 | 天天天天天天干 | 亚洲精品午夜一区人人爽 | 日韩美女自卫慰黄网站 | 丁香五月亚洲中文字幕 | 免费观看黄色的网站 | 在线视频永久免费网站 | 最近最新中文字幕免费大全 | 国产乱码人妻一区二区三区 | 插插好爽爽爽啊 | 黑人大棒日俄罗斯美女 | 天天综合天天综合色在线 | 乱爱妇乱子伦精品 | 高清性色生活片免费播放网 | 日本永久免费 | 中国黄色免费网站 | 久久视频在线视频观看2019 | 亚洲乱色熟女一区二区三区蜜臀 | 久久久久久久久久久大尺度免费视频 | 亚洲精品一区二区三区四区手机版 | 在线看免费大片45分钟 | 午夜亚洲国产理论片4080 | 欧美一级特黄刺激爽大片 | 欧美在线观看一区二区三区 | 班长你轻点灬爽灬宝贝一 | 久久久无码精品一区二区三区 | 精品无码人妻一区二区三区国产 | 中文字幕 在线 欧美 日韩 制服 | 亚洲精品久久久久久久不卡四虎 | 中国国产一级毛片视频 | 日本精品人妻无码202477 | 99国产精品久久久久久久久久久 | 又爽又色少妇视频 | 在线视频精品免费观看10 | 成免费播放观看在线视频 | 一道本不卡一区 | 亚洲精品www久久久久久 | 91频视| 亚洲人午夜射精精品日韩 | 亚洲 在线 日韩 欧美 | 日韩精品一区二区三区在线观看l | 亚州色区 | 欧美成人免费观看久久 | 亚洲欧洲一区二区三区在线 | bl全肉np双性受 | 国产悠悠视频在线播放 | 国产AV国片精品一区二区 | 色99视频 | 免费特黄一区二区三区视频一 | 国产精品99久久99久久久看片 | 在线看黄色网址 | 久久综合亚洲精品一区二区 | 日本大胆色情高清视频 | 茶卡盐湖| 午夜视频福利在线观看 | 国产精品艺校美女校花在线 | 香蕉在线综合2019版 | 黄页网站免费在线观看 | 秋霞伦理电影在线看 | 中文字幕人妻A片免费看 | 国产成人免费高清激情视频 | 好爽插到我子宫了高清在线 | 亚洲一区二区三区夜色 | 免费无码又爽又黄又刺激网站 | 国产成人久久精品推最新 | 婷婷五月花 | 亚洲 欧美 制服 校园 动漫 | 91在线视频免费观看 | 中国人电影网 | 福利视频导航大全 | 久久黄色一级视频 | 无码日本被黑人强伦姧视频 | 日韩一区二区三区不卡 | 国产春色 | 狠狠躁天天躁小说 | 日韩美一区二区 | 把女人弄爽A片特黄大片在线 | 久久不卡影院 | 国产91情侣在线精品国产 | 久久免费看 | 日韩免费视频在线观看 | 永久免费在线观看视频 | 成人全黄A片免费看 | 狠狠五月深爱婷婷网免费 | 午夜尤物禁止18点击进入 | 亚洲午夜视频在线 | 国产伦亲子伦亲子视频观看 | 免费看人与动人物XXXX | 国产成人无码免费看片色哟哟 | 亚洲成AV人片一区二区三区 | 午夜影片| 成年香蕉大黄美女美女 | 国产精品久久久爽爽爽麻豆色哟哟 | 九九视频免费精品视频免费 | 亚洲伦理在线 | 中文字幕日本特黄AA毛片 | 受在寝室被多攻高H男男小说 | 一级视频在线免费观看 | 国产一区二区精品尤物 | 99热99在线 | 日韩精品高清在线 | 97国产精品视频在线观看 | 一级毛片不卡片免费观看 | 午夜片神马影院福利 | 狠狠色噜噜狠狠狠狠色吗综合 | 国产亚洲欧美精品永久不卡 | 福利所导航导航导航导航 | 国产AV亚洲国产AV麻豆 | 国产人妻高清国产拍精品 | 后入到高潮免费观看 | 亚洲精品成A人在线观看 | 正在播放久久 | 亚洲美洲韩美在线观看 | 国产精品久久久久久人妻精品A片 | 国产真实伦在线观看视频 | 青草草在线视频 | 国产永久精品 | 在线高清无码欧美久章草 | 黑人日亚洲女人 | 免费黄色毛片视频 | 菠萝蜜国际一区麻豆 | 国产成人午夜精品影院 | 亚洲 校园 春色 另类 图片 | 日本H无码黄肉动漫后宫 | 囯产精品宾馆在线精品酒店 | 国产成人精品日本亚洲18图 | 国产精品伦理久久久久 | www黄色免费| 亲胸揉胸膜下刺激视频午夜小说 | 嗯啊HH禁忌翁公 | 最近更新中文字幕完整版视频 | 女人做爰的全部过程A片 | 国产精品V无码A片在线看 | 天天躁人人躁人人躁狂躁 | 最新精品视频2019在线视频 | 黄A无码片内射无码视频 | 苍井空免费线在线观看无需下载 | 草莓视频午夜在线观影 | 一级一片一_级一片一 | 伦理片 a在线线版韩国 | 国产精品午夜自在在线精品 | 精品樱空桃一区二区三区 | 婷婷se| 三级国产 | MAC水蜜桃色314麻豆 | 久久99精品久久久久久青青日本 | 亚州一级 | 欧美A级肉欲大片XXX | 国产九九九九九九九A片 | 久久国产精品免费视频 | 天天躁夜夜躁 | 中文无码乱人伦中文视频播放 | 国产午夜精品视频在线播放 | 成人在线视频免费 | www.天天干| 国产老师开裆丝袜喷水漫画 | 狠狠躁日日躁夜夜躁A片小说按摩 | 亚1州区2区3区4区产品乱码2021 | 天天躁人人躁人人躁狂躁 | 韩三级日本三级日本 | 国产伦亲子伦亲子视频观看 | 午夜精| 漂亮的av明星 | 中文字幕在线视频播放 | 免费毛片网 | 亚洲国产欧美目韩成人综合 | 日日摸夜夜添夜夜添A片图片 | 亚洲成a人v欧美综合天堂下载 | 老司机午夜精品视频观看 | 久久天天躁狠狠躁夜夜avapp | 国产鲁鲁视频在线播放 | 乱子伦xxxxvideos | 国内精品99 | 快播av电影网站 | 亚洲午夜在线观看 | 成人无码在线视频区 | 日本道免费精品一区二区 | 欧美日韩精品一区二区三区视频在线 | 国产日本一线在线观看免费 | 亚州日韩精品AV片无码中文 | 999xxxx| 永久免费在线观看视频 | 中文字幕人妻熟女人妻 | 日日影院| 青青自拍视频一区二区三区 | 影音先锋中文5566资源 | 色偷偷色偷偷色偷偷在线视频 | 老妇毛片久久久久久久久 | 国产高清在线观看视频手机版 | 亚洲午夜无码毛片AV久久小说 | 色婷婷综合在线视频最新 | 四房播播地址 | 度年华在线观看全集免费播放 | 成年女人在线视频 | 片成年免费观看网站黄 | 日本中文字幕不卡 | 色偷偷色偷偷色偷偷在线视频 | 亚洲精品一区二区绿巨人 | 高清二区| 国产又粗又猛又爽又黄的A片小说 | 波多野结衣在线高清 | 99久在线精品99re6视频 | 欧美激情综合色综合啪啪五月 | 精品手机在线视频 | 蜜桃色情在线观看 | 天天躁夜夜躁 | 人成乱码一卡二卡三四卡五卡六卡 | 日韩福利片午夜在线观看资源 | 日本一品道无码免费专区在线观看 | 天天黄色 | 最近中文字幕2019免费BD | 亚洲欧洲自拍拍偷 | 亚洲高清国产拍精品5g | 久久精品久久精品国产大片 | 99在线视频免费观看视频 | 中文字幕一区在线观看视频 | A片娇妻被交换粗又大又硬V | 色姑娘综合网久久 | 国产手机视频在线 | 91福利国产在线观看一区二区 | 孕妇孕妇aaaaa | 久久草免费线看线看2 | 欧美性videos高清精品 | 雨天车站H肉动漫在线观看 玉女jy荡小说 | 影音先锋av资源看波波 | 放荡勾人h的辣文 | 丁香六月激情婷婷 | 91网站免费看 | 国产熟妇BBWBBWBBW歼尸 | 成人在线视频免费 | 国产人妻一区二区无码 | 老湿机费x一分钟影院体验区 | 把腿张开老子臊烂你小说描写 | 亚洲欧洲日韩国产一区二区三区 | 国产在线一区观看 | 成品人和精品人的在线观看 | 久久久久久久久久免免费精品 | 黄 在线| 亚洲AV无码男男A片在线观看 | 1000美女模特人体照 | 国模私拍高清大胆 炮战 | 欧美日韩中文亚洲v在线综合 | 黄色在线免费 | 美女扒开腿让男人桶爽30分钟 | 婷婷五月色综合 | 亚洲精品国产一区二区贰佰信息网 | 欧美hdxxxx| 国产美女无遮挡裸体毛片A片软件 | 色综合久久精品亚洲国产 | 亚色图| 日韩精品免费在线观看 | 双性精跪趴灌满h室友4p | 亚洲一区二区三区色情爆乳 | 一级不卡毛片免费 | 午夜精品久久久久久久久日韩欧美 | 亚洲精品乱码一区二区三区 | free亚洲 | 国产成人+亚洲欧洲 | 精品一区二区在线观看 | 国产区成人综合色在线 | 中国农村自拍hdxxxx性自拍 | 亚洲日本韩国在线 | 国产av在在免费线观看美女 | 色网址大全123 亚洲 | 一级片中文字幕 | 国产精品反差婊在线观看 | 忘忧草WWW大地行情网 | 边做边爱完整版免费视频播放视频 | 国产丰满老熟妇乱XXX | 伊人久久综合成人网小说 | 黄色一级毛片 | 亚洲AV成人一区二区三区在线观看 | 国产一区日韩二区欧美三区 | 中文字幕精品视频在线 | 在线三级网 | chinese熟女熟妇m1f | 在线va无卡无码高清 | 日本高清在线观看视频www | 国模嘉妮极品美胞 | 亚洲精品久久久久久久不卡四虎 | 亚洲第一天堂网 | 久在线视视频在线观看 | 麻豆国产13p | 亚洲中文字幕无码爆乳APP | 国产单亲乱子伦视频 | 午夜A片无码福利1000集 | 色妹子影院 | 国精品人妻无码一区二区三区性色 | 国产亚洲熟妇在线视频 | 2024高清国产一区二区三区 | 美国一级毛片免费看 | 精品乱码一区二区三区四区 | 波多野结衣久久一区二区 | 亚洲欧美中文字幕高清在线 | 日本中文在线播放 | 再深点灬舒服灬受不了了视频 | 影音先锋熟女少妇AV资源 | 男女做爰的全部过程A片 | 成人国产精品免费视频 | 日韩亚洲国产综合高清 | 给啪啪视频免费观看 | 窝窝午夜看片免费视频 | 2020亚洲欧美日韩在线观看 | 亚洲欧美国产双大乳头 | 亚洲精品中文字幕无码A片老网站 | 久久高清免费视频 | 国产成人精品999在线 | 日产精品一二三四区气温 | 国产在线播放精品视频 | 欧美日韩一区二区三区色综合 | 国产精品黄色 | 人人爱免费在线观看 | 国产在线激情视频 | 亚洲人成网77777色在线播放 | 美女视频黄a视频全免费网站色窝 | 国产黄A片免费网站免费 | 国产热久久精 | 国内自拍视频在线播放 | 99久久精品无码一区二区毛片 | 大菠萝福利中心app 大尺度很黄很肉的小说 | 青青草在9线观看 | 成AV人片一区二区三区久久 | 1区2区3区4区产品在线线乱码 | 日本黄色一区 | 免费A级毛片黄A片高清在线播放 | 免费电影伦理片 | 99re8在线精品免费观看 | 国产精品岛国久久久久 | 婷婷亚洲综合 | 岳 好紧好爽再浪一点 | 国产在线不卡一区 | 国产福利萌白酱在线观看网站 | 亚洲午夜久久久久久尤物 | 一本-道久久A久久精品综合 | 日韩精品一区二区三区中文 | 99re热| 最近电影大全免费 | 亚洲天堂精品视频 | 97色五月 | 欧美性猛交99久久久久99 | 夜夜操天天操 | 波多野办公室激情A片 | 日日摸夜夜添夜夜添A片一Y | 精品人妻无码一区二区三区下一页 | 狠狠色伊人亚洲综合第8页 狠狠色网 | 国产成人高清视频免费播放 | 中文字幕日本不卡一二三区 | 免费三级现频在线观看免费 | 99久久免费国产精精品 | 亚 洲 视 频 高 清 无 码 | 四虎影视4HU最新地址在线 | 亚洲欧洲精品成人久久曰 | 99久久点在线精品 | 亚洲区色影 | 亚洲欧洲一区二区三区在线观看 | 欧美黑人巨大精品videos一 | 欧美成人精品第一区 | 999视频精品全部免费观看 | 色综合久久久久久久久久久 | 精品人伦一区二区三区潘金莲 | 三级日本高清完整版热播 | 亚洲成 人图片综合网 | 久久精品久久精品久久精品 | 毛片高清一区二区三区 | 日产精品卡2卡三卡乱码网址 | 国产资源在线观看 | 91制片厂制作果冻传媒八夷 | 国自产拍偷拍精品啪啪色 | 中文字幕 亚洲 有码 在线 | av伦理天堂| 三级片在线看 | 91网站视频在线观看 | 日本免费一区二区三区a区 日本免费一区二区久久人人澡 | 三a级毛片 | 免费黄色网址在线播放 | 日本污污网站 | 精品亚洲国产成人A片APP | 看黄子片wwwabc300 | 肉肉描写很细致的黄文 | 成人app在线观看 | 搡女人真爽免费视频大全软件 | 色情欧美片午夜国产特黄 | 日韩A片无码毛片免费看久久 | 18禁免费裸乳裸体视频网站 | 俺去也影音先锋播放 | 亚洲 欧美 影音先锋 | 精品乱子伦一区二区三区 | 日本黄视频网站 | 欧美一卡二卡三卡四卡 | 亚洲精品久久久久久久久无码精品 | 王爷在书房含乳尖H女攻男受 | 亚洲AV国产AV综合AV卡 | 亚洲中文字幕无码一久久区 | 没有废话全色肉的黄文 | 国产精品视频第一区二区三区 | 国精产品一二二区视早餐有限公司 | 最近免费MV在线观看动漫 | 一级美国乱色毛片 | 亚洲视频影院 | 深夜爽爽动态图无遮无挡 | 爱色影音 | 爱啪网亚洲第一福利网站 | 欧美日韩中文国产一区二区三区 | 99久久免费看少妇高潮A片 | 免费观看碰碰碰视频在线观看 | 亚洲精品一区二区三区早餐 | 久久五月天综合网 | 精品国产美女AV久久久久 | 成人免费一区二区无码视频 | 精品国产乱码久久久久久人妻 | 娇妻的闺蜜下面好紧 | 日日av | 麻豆AV久久无码精品九九 | 日本三级观看高清免费 | 在线观看网站国产 | 久久久久综合中文字幕 | 97在线观看视频 | 精国产品一区二区三区A片 精产国品一二三产品麻豆 金瓶梅2快播 | 免费无套内谢少妇毛片A片软件 | 国产在线欧美精品中文一区 | 国产精品久久久久久久久久妇女 | 亚洲综合激情小说 | 国产中文字幕久久 | 久久国产免费观看精品A片 久久国产免费观看精品1 | 国产精品成熟老女人视频 | 丁香人妻| 欧美高清在线视频一区二区 | 五月天激情丁香 | 国产精品沙发午睡系列990531 | 夜夜操狠狠干 | 动漫精品欧美一区二区三区 | 免费片观看 | 成人国产精品 | 国产在线一卡 | 夜夜国产亚洲视频香蕉 | 全部孕妇孕交BBBBBB | 成人国产精品免费视频 | 亚洲日本在线观看视频 | 噜噜噜噜噜 | 国产成人综合自拍 | 亚洲精品国产成人无码区A片 | 亚洲50熟女性视频免费 | 天美影视传媒app | 性配久久久 | 快播官网首页 | 欧美同性精品xxxx | 美国一级免费毛片 | 精品AV综合一区二区三区 | 最近中文字幕国语免费完整 | 国产欧美精品一区二区色综合 | 边做边爱完整版免费视频播放视频 | 日本www色视频成人免费 | 女主床戏被进高H | 日韩三级在线免费观看 | 岳 好紧好爽再浪一点 | 日本激情网站 | 黑人极品videos精品欧美裸 | 国产激情三级 | 秋霞伊人 | 最好看的最新的中文字幕 | 久热综合 | 欧美午夜福利1000集2019年 | 小荡货腿张开给我cao免费视频 | 日本一道一区二区免费看 | 免费精品国产人妻国语三上优雅 | 国产在线一区观看 | 亚洲精品久荜中文字幕 | 国产真实乱人偷精品人妻图 | 日韩黄色大全 | 欧美午夜寂寞影院安卓列表 | 午夜视频在线免费观看 | 黑人巨大 xxxxxxx | 99精品视频免费观看 | 三级黄色片在线观看 | 久久黄色小视频 | 波多野结衣全部系列在线观看 | 乱子伦视频在线看 | 韩日a级片| 欧美成人A片免费无码毛片 欧美成人大色情大片破碎的拥抱 | 国产乱人伦AV麻豆网 | WWW久久久爱CNM | 欧美XXXXXXX乱XXX另 | 张津瑜和吕知樾事件 | 亚洲日韩一区精品射精 | 国色精品卡一卡2卡3卡4卡免费 | 成 人在线观看视频网站 | 国产黄在线观看免费观看 | 亚洲天堂v| 蝌蚪久久窝 | 丁香网址| 色视视频| 黄色一级性生活视频 | 精品久久久久久无码人妻国产馆 | 四虎影视成人永久免费观看视频 | 伊人性伊人情综合网 | 国产美女被爽到高潮免费A片 | 久久99精品久久久久久综合 | 99视频精品免视看 | 午夜免费网站 | 年轻漂亮的妺妺中文字幕版 | 医生护士一级毛片 | 免费三级现频在线观看免费 | 2019国产最新视频在线观看 | 最近2019中文字幕免费 | 中文国产乱码在线人妻一区二区 | 丁香五月久久婷婷久久 | 好想被狂躁A片免费久99 | 国产高清管线视频免费 | 一个人看的在线www高清视频 | tobu8 hd | 国产亚洲精品精华液 | 高h禁伦没羞没躁 | 黄色成年人视频 | 国产精品日本一区二区在线播放 | 自拍日韩亚洲一区在线 | 国产精品久久久久久日本一道 | xxxx.欧美| 亚洲区色情区激情区小说 | v天堂| 亚洲欧美偷拍综合图区 | 99热久久精品国产一区二区 | 韩国日本三级在线播放 | 亚洲aⅴ| 看三级毛片 | 亚洲天堂资源 | 涩涩AV视频一区二区三区 | 欧美又粗又大XXXX无码 | 进去粗粗硬硬紧紧的好爽免费视频 | 在线免费视频 | 亚洲免费人成 久久 | 2020最新无码国产在线视频 | 免费三级现频在线观看免费 | 99精品免费观看 | 2015av天堂影音先锋 | cao美女视频在线观看 | 粗大的内捧猛烈进出在线视频 | 欧美 亚洲 另类 综合网 | 99久久99久久久99精品齐 | 最新国产精品自拍 | 最爽快的乱肉小说合集500篇 | 麻豆久久婷婷综合五月国产 | 国产乱码精品一区二区三区四川 | 中文字幕 日韩 人妻 无码 | 婷婷色网站 | 一区二区国产在线播放 | 国产99九九久久无码熟妇 | 波多野结衣33分钟办公室jian情 | www.av视频在线观看 | 狠狠色很很鲁在线视频 | 99久久精品国产高清一区二区 | 天天草综合| 精品综合久久久久久97超人该 | 理论片午午伦夜理片1 | 日本a在线视频 | 国产成人精品免费视频网页大全 | 五月婷婷丁香久久 | 成年女人免费观看视频 | 黄色一级毛毛片 | 一个人看的手机视频www | 在线免费视频 | 免费无遮挡无码永久在线观看视频 | 傲慢与偏见电影下载 | 成人 网址| 亚洲区欧美日韩综合 | 91极品哺乳期女神挤奶在线 | 天天综合天天看夜夜添狠狠玩 | 影音先锋av最新资源站 | 成人性生交A片免费看麻豆 成人性生交大片免费看中国A片 | 永久域名在线观看视频 | 免费精品美女久久久久久久久 | 性夜黄A片爽爽免费视频 | 麻豆文化传媒官方网站入口免费 | 久久免费看少妇高潮A片特黄古 | 国产一二三区有声小说 | 色偷拍亚洲国产大姐 | 久久久久久电影 | 日韩精品极品视频在线观看免费 | 99精品久久 | 脱女学小内内摸出水网站免费 | 午夜一级毛片不卡 | 撕开胸罩胸奶头玩大胸动态图片 | 国产福利2021最新在线观看 | 日本中文在线 | 好色网| 四虎影视最新的2024版地址 | 91免费国产高清观看 | 黄色一级片免费网站 | 中国黄色一级 | 色网综合 | 第九色影院 | 国产最新免费高清在线视频 | 国产在线精品亚洲观看不卡欧美 | 色情成人免费视频激情在线观看 | 久久久毛片免费全部播放 | 精品婷婷乱码久久久久久日日 | 亚洲v天堂| 久久夜夜操妹子 | 久久久久久国产精品三级 | 成人性生交A片免费看导航大全 | 欲求不満の人妻松下纱荣子 | 三级久久 | 丁香五六月婷婷 | 色哟哟在线观看入口 | 欧美真人性做爰一二区欧美影院 | V11亚二新区乱码无人区 | 狠狠色婷婷日日综合五月 | 欧美人妇无码精品久久 |