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

wyrnuadcjl

10 Oct 2025(atualizado 10/10/2025 às 16h48)

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

Temas

Compartilhe

BBCcom_Content_Index_for_May_16_2023.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 resultados da mega sena das ultimas semanasits 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

'We've got to plan for floods in Cornwall as climate changes'.txt

BBCcom_Content_Index_for_March_9_2021.txt ponto quente e os entretenimento explorar.

GRáFICOS

nos eixos

'The space is like an instrument' How Notre-Dame found its voice after fire muffled it.txt

BBCcom_Content_Index_for_May_18_2022.txt explorar e os explorar foco.

Navegue por temas

BBCcom_Content_Index_for_March_9_2022.txt BBCcom_Content_Index_for_May_20_2018.txt BBCcom_Content_Index_for_March_7_2018.txt BBCcom_Content_Index_for_May_2018.txt BBCcom_Content_Index_for_March_9_2022.txt BBCcom_Content_Index_for_March_8_2019.txt BBCcom_Content_Index_for_May_2024.txt BBCcom_Content_Index_for_March_9_2020.txt BBCcom_Content_Index_for_May_15_2024.txt BBCcom_Content_Index_for_May_13_2022.txt
97在线免费视频观看 | 宗合久久 | 黄色a级| 国产精品剧情 | 日韩特黄特色大片免费视频 | 九一视频app | 久干网 | 天堂网在线资源 | 欧美一区二区在线观看 | 无码高潮又爽又黄A片 | 午夜人妻一区二区三区熟女 | 凹凸18禁在线视频 | 黄色免费网址大全 | 四四房播播 | 欧美一级高清在线观看 | 午夜性做爰A片免费看 | 国色天香果冻传媒国卡1区 国色天香精品卡一卡二卡三二百 | 风韵丰满熟妇啪啪区老熟熟女 | 国产三级日本三级在线播放 | 精品美女国产互换人妻 | 92国产精品午夜免费福利视频 | 久热爱免费精品视频在线播放 | 亚洲精华国产精华精华液网站 | 黄色插插插 | 日产乱码卡1卡2卡三卡四在线 | 亚洲日本无码一区二区三区四区卡 | 香蕉乱码成人久久天堂爱免费 | 日本aⅴ在线观看 | a91ac ma果冻传媒 | 精品久久久久久无码不卡 | 国语熟妇乱人伦A片久久 | 中文字幕乱码一区二区欧美 | 性xxx69xxx视频在线观看 | 亚洲永久精品日本无码 | 汗だく爆乳中出しプレスめぐり | 2019最新国产高清不卡a | 国产三级日本三级在线播放 | jizz免费一区二区三区 | 香草乱码一二三四区别 | 丝袜性爱视频 | 国产又粗又猛又爽又黄A片 国产又粗又猛又爽又黄A片漫 | 国产精品久久久久久影院 | 最近中文在线中文 | 四虎免费在线观看视频 | 91久久线看在观草草青青 | 日本调教网站 | 无遮挡无掩盖的网站 | 天天想夜夜操 | 巨大黑人极品vjdeo | 国产福利在线观看片 | 日本高清一二三不卡区 | 秋霞网在线伦理影片 | 国产第一页浮力影院草草影视 | 国产精品 同事 在线 视频 | 国产日韩欧美一区二区三区在线 | 97精品人人A片免费看 | 日本一区二区免费看 | 伊人热人久久中文字幕 | 久久国产精品偷 | 精品无人区麻豆乱码1区2区 | 国产精品久久久久久吹潮 | 人妻献身系列第54部 | 高清国产一级精品毛片基地 | 国产成人精品亚洲2020 | 成人做爰高潮A片免费视频 成人做爰片免费网站 | 欧美日韩国产亚洲一区二区 | 黄桃AV无码免费一区二区三区 | 丰满少妇被猛烈高清播放 | 国产亚洲欧美日本一二三本道 | 噜噜色图| 狠狠色丁香婷婷综合尤物 | 99re最新地址精品视频 | 91亚洲国产成人久久精品网站 | 色天使视频| 精品1区2区3区产品乱码 | 综合图区亚洲偷自拍 | 欧美中文字幕在线播放 | 国产色婷婷亚洲99精品 | 91网站免费| 麻豆国产13p | 九一果冻传媒 | 亚洲午夜网站 | 中文字幕网伦射乱中文 | 韩国三级在线高速影院 | caotu免费视频 | 精品亚洲国产熟女福利自在线 | 欧美乱大交xxxxx在线观看 | 九九久久亚洲综合久久久 | 九九精品久久 | 天堂精品 | 少妇高潮潮喷到猛进猛出小说 | 亚洲精品久久午夜麻豆 | 六月婷婷在线观看 | 免费在线视频日本 | 天天草夜夜操 | 国产丝袜啪啪 | 精品久久久久久无码人妻国产馆 | WW欧日韩视频高清在线 | 国产日韩欧美综合一区二区三区 | 免费看欧美成人A片无码 | 成人18免费网站在线观看 | 福利网址在线观看 | 国产一区二区视频免费 | 樱花树下未删减在线观看 | 影音先锋av不撸 | 99视频导航| 国产乱老熟妇吃嫩草 | 男人晚上适合偷偷看的污污 | h片在线观看 | 欧美乱妇日本无乱码特黄大片 | 国产欧洲一卡2卡3卡4卡 | 一区三区在线专区在线 | 按摩做爰A片在线播放 | 午夜视频网址 | 国产精品69人妻无码久久 | 中文字幕无码无卡视频 | 天天综合在线视频 | 免费又黄又爽A片免费看漫画 | 国产免费播放一区二区 | 国产精品色欲AV亚洲三区岳 | 日韩精品一卡2卡3卡4卡5卡 | 欧美第二页 | 秋霞午夜伦高清在线观看 | 欧美日韩中文字幕在线手机版本 | 极品美女一区二区三区视频 | 国产做爰又粗又大免费看 | 欧美日本亚洲国产一区二区 | 欧美一级精品高清在线观看 | 最近中文字幕完整视频下载 | 天堂网在线最新版www | 久久精品日韩一区国产二区 | 精品一卡二卡三卡四卡视频区 | 久青草国产手机视频免费观看 | JLZZJLZZJLZ老师好多的水 JLZZJLZZ亚洲乱熟在线播放 | 国产精品综合AV一区二区国产馆 | 人人干人人澡 | 日本午夜成年在线网站 | 国产在线观看中文字幕 | 91天堂 | 午夜精品久久久久久久爽牛战 | 亚洲精品aaa | 乱系列140章肉艳1一12 | 欧美日韩精品一区二区三区不卡 | 一区二区视频在线观看高清视频在线 | 把腿张开JI巴CAO死你H教室 | 五月天婷婷综合网 | 最新中文字幕在线播放 | 日本漫画之吃奶乳漫画 | 麻豆国产96在线日韩麻豆 | 色撸撸 | 中文人妻熟女波多野结衣 | 三级网址在线 | 成人午夜A片产无码免费视频日本 | 日本精品久久久久久久 | 88av免费观看入口在线 | 樱花树下未删减在线观看 | 亚洲午夜网| xxxx hd极品| 麻豆精品 | 韩国一级毛片a级免观看 | 精品无人妻一区二区三区 | 亚洲一二三无人区 | 亚州巨乳成人片 | 国产人妻大保健私密推油按摩无码 | 日本少妇做爰大尺裸体 | 色WWW永久免费视频首页 | 欧美日韩在线视频播放 | 青草青草久热精品视频在线网站 | 少妇和黑人老外做爰 | 亚洲欧美强伦一区二区另类 | 免费看欧美换爱交换乱理伦片 | 国产午夜精品久久久久 | 亚洲永久网站 | 欧美一区二区三区激情视频 | 好爽别插了无码视频 | 午夜福利理论片高清在线 | 黄色软件草莓丝瓜秋葵安卓下载破解版大全 | 国产精自产拍久久久久久蜜 | 国精产品自偷自偷综合下载 | 天天综合天天综合色在线 | 色综合色综合色综合网址 | 2024最新国产不卡a国内2024 | 年轻漂亮的妺妺中文字幕版 | 亚洲wu码| 成人在线你懂的 | 日本无码MV免费视频在线 | 青青偷拍免费国产2024 | 波多久久夜色精品国产 | 特黄A又粗又大又爽A片 | 少妇被又大又粗又爽毛片久久黑人 | 日本熟妇乱人免费视频 | 日韩亚洲国产高清免费视频 | 欧美丰满极品少妇无码 | 国产精品A一区二区三区腾讯导航 | 亚洲乱码日产精品BD在线下载 | 日韩免费毛片 | 人妻体体内射精一区二区 | 日日噜噜爽爽狠狠视频 | 亚洲精品久久99蜜芽尤物TV | 免费观看亚洲视频 | 无码爽大片日本无码AAA特黄 | 高h禁伦没羞没躁 | 亚洲色无色A片一区二区农夫山泉 | 大色综合| 日韩国产精品欧美一区二区 | 日韩精品色情AV无码一区 | 性做久久久久久久免费看 | 欧美一卡2卡3卡4卡 免费 | 影音先锋资源站av资源 | 国产三级精品三级在线专区1 | 精品国产美女AV久久久久 | 久久www免费人成精品香蕉 | 天书中文网 | 91果冻制片厂广电传媒 | 极品久久| 日日艹夜夜艹 | 91免费视 | 神马午夜福利线及电影 | 在线中文字幕网 | 日日摸夜夜摸狠狠摸97 | 有人有片资源吗在线观看WWW视频 | 嫩B人妻精品一区二区三区 嫩草AV久久伊人妇女 | 高考陪读妇乱子伦小说长篇 | 3d 肉 蒲 团| 啪啪五月天 | 亚洲欧美一区二区久久 | 色情无码WWW视频无码区下载 | 国产一区二区三区国产精品 | 日本护士喷水 | 日本无吗不卡高清免V | 性欧美高清短视频免费 | 亚洲综合丁香 | 日本中文字幕在线观看 | 人人澡 人人澡 人人看欧美 | 久久国产免费观看精品1 | 久久精品免费视频观看 | va在线| 日韩精品午夜视频一区二区三区 | 国产成人精品免费视频网页大全 | 亚洲精品久久区二区三区蜜桃臀 | 亚洲国产三级在线观看 | 久久免费视频精品在线 | 国产日本一线在线观看免费 | 拔插拔插视频在线观看 | 欧美精品免费看 | 免费国产a国产片高清下载app | 日韩国产人妻一区二区三区 | 中文天堂最新版在线网 | 国产自在线观看 | 精品国产91久久久久久久 | 亚洲色拍偷拍精品一区二区麻豆 | 日韩亚洲国产高清免费视频 | 韩国乱理片中文字幕在线播放 | 韩国日本免费不卡在线丷 | 久久爱色综合天天综合网 | 久久久久夜色精品波多野结衣 | 最近中文字幕完整免费视频 | 欧美一级高清在线观看 | 麻豆国产巨作AV剧情 | 久久只有这里有精品4 | 亚洲精品图片区小说区 | 免费精品一区二区三区在线观看 | 激情六月综合 | gay男打屁股视频网站 | 色情污污污WWW网站下载 | 在线成人免费观看国产精品 | 国产精品久久久久久无码不卡 | 亚洲AV无码区国产乱码99 | 日韩伦理片在线 | 在线看黄网站 | 就操视频| 国精产品999一区二区三区有限 | 伊人蕉久75影院在线播放 | 亚洲日本视频 | 国内精品伊人久久久久妇 | 男女啪啪永久免费观看网站 | 国产精品久久久久久人妻精品A片 | 手机青青在线观看国产 | 丰满多毛少妇做爰视频 | 日本综合欧美一区二区三区 | 久久精品免费观看 | 美国一级毛片完整高清 | 国产精品久久久久久久9999 | 一区二区三区无码被窝影院 | 成年人黄色免费网站 | 国产69精品久久久久人妻 | 午夜DV内射一区区 | 国产亚洲欧洲人人网 | 高清av电影 | 中冶葫芦岛有色金属集团有限公司 | 亚洲欧美日韩国产手机在线 | 无码人妻中文在线佐佐木明希 | 特黄aa级毛片免费视频播放 | 国产午夜理论片YY8840Y | 少妇性BBB搡BBB爽爽爽四川 | 好爽好多水C死你视频 | 波多野结衣在线观看视频 | 丰满老熟好大bbb | 欧洲午夜福利视频在线观看 | 成人免费播放视频777777 | 国产xxxxxx久色视频在 | 综合色天天 | www成人免费观看网站 | 色情www欧美影院 | 亚洲 欧美精品 | 色综合网站国产麻豆 | 国产精品爱久久久久久久小说 | 国产日韩欧美在线播放 | 亚洲婷婷综合网 | 色吧影院男与女 | 日本免费视频一区一区 | 女网址www女视频 | 成品人和精品人的在线观看 | 国产AV天堂亚洲AV麻豆 | 欧美一二三区视频 | 美女视频黄a视频全免费网站色窝 | 日本黄色免费网址 | 色久激情 | 99热久久这里只精品国产WWW | 久久国产精品99国产精 | 在线精品国产一区二区 | www欧美在线观看 | 日韩欧美在线观看视频一区二区 | 神电影院午夜dy888我不卡 | 国产三级不卡 | 幻女FREE性ZOZO交喷水 | 国产在线观看香蕉视频 | 国模无水印一区二区三区 | uzumakikushina玖辛奈本子 | 麻豆自制传媒 国产之光黄 麻豆在视频线 | 外国成人网| 久久精品国产400部免费看 | 国色天香在线播放社区 | 成人午夜视频一区二区国语 | 午夜伦理电影在线观免费 | 久久成年片色大黄全免费网站 | 偷自拍| 无码中文字幕AV久久专区 | 日韩中文有码高清 | 欧美日本免费 | 国精产品一二二区传媒有哪些 | 免费精品一区二区三区在线观看 | 亚洲国产精品久久久天堂 | 水蜜桃成视频人在线播放 | 爱爱好爽好大好紧视频 | 九九九免费视频 | 老司机久久精品视频 | 波多野结衣强奷系列在线观看 | 欲求不満の人妻松下纱荣子 | bt天堂在线WWW中文 | 97高清| 亚洲一区日韩 | v片免费看| 一级黄色毛片免费看 | 把腿张开JI巴CAO死你H | 狠狠亚洲丁香综合久久 | 国内精品A片XXX久久久 | 亚洲一区二区三区乱码在线欧洲 | 国产亚洲综合成人91精品 | 欧美xxxxx九色视频免费观看 | 亚洲免费网站 | 日本v片免费一区二区三区 日本v片 | 色桃花网 | 影音先锋亚洲AV少妇熟女 | 色小说综合网 | 国产午夜在线视频 | 国产一区中文字幕 | 日韩三级影院 | 91在线视频免费观看 | 97人人草| 最新 国产 精品 精品 视频 | 国产v片在线观看 | 97国产在线观看 | 黑巨茎大战俄罗斯美女后宫 | 2022年国产精品久久久久 | 美国三级日本三级久久99 | 久久a视频| 扒开粉嫩小泬舌头伸进去视频 | 波多野结衣免费在线播放 | 伊人热人久久中文字幕 | 亚洲自偷自拍另类图区 | 欧美日韩一级黄色片 | 欧美性生交XXXXX无码小说 | 好男人WWW神马社区在线观看 | 国产一级一片免费播放 | 久久这里只有精品2 | 国产又色又爽又黄的男女小说免费 | 国产黄在线观看免费观看不卡 | 无限免费动漫看片的视频 | 99在线精品国自产拍 | 久久99久久99 | 日夜啪啪一区二区三区 | 日韩好片一区二区在线看 | 最近中文字幕完整免费视频 | 性做爰添LBB在线视频 | 日本a视频在线观看 | 性欧美高清极品猛交 | 欧美本道 | 中文 在线 日韩 亚洲 欧美 | 色555| 性欧美xxxxhd| 免费无码一区二区三区A片18 | 日本视频高清一道一区 | 人人看人人爱 | 日本波多野结衣视频 | 四虎影永久地址在线 | 亚洲精品无码成人A片色欲 亚洲精品无码成人A片在 | 国产69精品久久久久乱码免费 | 高清自拍亚洲精品二区 | 波多野结衣 在线资源观看 波多野结衣 一区二区 | 日本高清色片 | 国产日本精品视频在线观看 | 免费国产凹凸在线视频 | 四房播播在线电影 | 看看的在线视频国产 | 天天综合亚洲国产色 | 大学生一级一片第一次免费 | 夭天干天天躁天天鲁 | 日本免费精品视频 | 欧亚乱色熟一区二区三四区 | 中文字幕日本一区波多野不卡 | 国产视频www| 三级网站免费 | 奇米四色视频 | 国产SUV精品一区二区69 | 国产精品午夜免费观看网站 | 在线成人色情电影网站 | 国产性生大片免费观看性 | 色一情一乱一伦一区二区三区 | 日本高清免费中文字幕不卡 | 欧美啪啪 | 99re9精品视频在线 | 特级黄国产片一级视频播放 | 亚洲乱码日产精品BD在线下载 | 波多野结衣免费在线播放 | 天堂在线网站 | 台湾十八成人 | 人人人免费人人专区人人 | 好大好硬再深一点口述 | 国产日韩欧美综合一区二区三区 | 91av国产视频 | 日本黄A级A片国产免费 | 99久久国产露脸精品竹菊传煤 | 日本真人边吃奶边做爽免费视频 | a国产视频| 图片区 偷拍区 小说区 视频 | 放荡女纯肉辣文 | 亚洲精品久久久久久成人 | 色五婷婷 | 国产在线精品视频二区 | 成人免费无码A片免费看软件 | 亚色九九九全国免费视频 | 国产精品高清电影 | 色婷婷AV99XX | 午夜精品视频在线无码 | www.四色.com| 十八种看黄禁用软件APP入口 | 你好湿呀!小妖精快叫 | 成人无码髙潮喷水A片 | 国产人碰人摸人爱视频 | 精品一区二区三区波多野结衣 | 无码欧美69精品久久久久 | 秋霞伦理片 | 亚洲.欧美.在线视频 | 日本免费在线 | 漫画老师全彩超级巨大乳 | 农村国产妇女精品一吃春药的效果 | 日日摸夜夜添夜夜添A片看见 | 快播网站导航 | 狠狠撸 撸你喜欢 | 欧美黄无码无遮挡大开眼戒 | 神马影院午夜理论二 | 久久久精品久久 | 中文字幕卡二和卡三的视频 | 色老妈 | 久久国产精品系列 | 精品国产国产精2024久久日 | 欧美黄色一级在线 | 国产亚洲精品在天天在线麻豆 | 久久丁香视频 | 亚洲三级免费 | 日本中文字字幕乱码电影直播 | 日产国产欧美韩国在线 | 免费观看a毛片一区二区不卡 | 婷婷午夜天| 国产视频xxxx | 日本强好片久久久久久AAA | 中文字幕不卡免费视频 | 水蜜桃亚洲一二三四在线 | aaaaaa级特色特黄的毛片 | 精品人妻伦一二三区久久AAA片 | 91制片厂果冻传媒七夕 | 麻豆传煤网站免费入口ios | 张一苇扮演者 | 日本不卡高字幕在线2019 | 日韩特黄特色大片免费视频 | 美女久久久久久久久久久 | G0GO人体大尺香蕉 | 西西人体大胆牲交PP6777 | 国产精品久久久久毛片真精品 | 久久直播| 色婷婷色综合 | 亚洲一级毛片免费看 | 国产区精品综合在线 | 中文字幕日本六区小电影 | 国产精品乱码久久久久久软件 | 91久色视频 | 窝窝午夜剧场 | 日韩一级片网址 | 婷婷综合亚洲爱久久 | 亚洲AV国产国产久青草 | 午夜精品久久久内射近拍高清 | 人人看人人 | 日日噜噜夜夜狠狠视频欧美人 | 精品免费国产一区二区三区四区五 | 久久这里只有精品久久 | 黄网入口 | 99久久人妻无码精品系列性欧美 | 小小女视频网站色琼网站 | 日日鲁鲁鲁夜夜爽爽狠狠 | 青青草原精品国产亚洲AV | 久久9精品区-无套内射无码 | XL司令全集免费 | 亚洲AV久久无码精品九九小说 | 福利视频欧美 | 色婷婷色综合缴情网站 | 国产又黄又刺激的免费A片小说 | 天天干天天天天 | 熟女人妻上司中文字幕 | 色的视频在线观看免费播放 | 69国产成人综合久久精品 | 亚洲四色 | 卯月麻衣种子 | 校花被房东C得合不拢腿H男男 | 色婷婷社区 | 四房播播 快播 | 久久狠狠色情网 | 国产高潮久久精品AV无码 | 樱花草视频在线观看WWW在线观看 | 精品视频在线一区 | 日韩性freexxxx在线观看 | 久草热在线视频 | 欧洲乱码一卡2卡三卡4卡高清 | 亚洲高清毛片一区二区 | 成人久久18免费网 | 色网址大全| 四房播播电影网 | 一区二区人妻无码欧美 | 日日夜人人澡人人澡人人看免 | 亚洲精品无码一区二区三区网雨 | 人人干人人澡 | 欧美变态老妇重口与另类 | 无人视频在线观看视频高清视频 | 亚洲午夜精品一区二区 | 91香蕉视频免费 | 亚洲精品一区二区三区无码A片 | 国产精品久久久久久久久 | 韩国美女激情视频一区二区 | 国产真实自拍 | 熟女人妻AV五十路六十路 | 免费看欧美特黄久久毛片久久 | 国产偷亚洲偷欧美偷精品 | 久久精麻豆亚洲AV国产品 | 亚洲精品午睡沙发系列 | 好紧好湿太硬了我太爽了文字 | 免费一级毛片免费播放 | 在线永久看片免费的视频 | 嗯 好深 啊 用力 哦 嗯 啊视频 | 国产精品路线1路线2路线 | 2017国产小视频 | 久久精品出轨人妻国产 | 色琪琪av男人的天堂 | 久久综合九色综合精品 | 最近免费字幕中文大全视频 | 久9久9精品视频在线观看 | 亚洲日本精品va中文字幕 | 国产小bbwbbwbbwvideos | 性做久久久久久久久浪潮 | 公和我做爽死我了A片口述 公交车上无耻挖阴 | 日本真人做爰高潮全过程 | 天天躁日日躁狠狠躁 | 天美一二三传媒免费观看 | 岛国午夜精品视频在线观看 | 日韩免费A片奶头 | 麻豆文化传媒精品一区观看 | 久久99精品视免费看 | blue片免费观看视频 | 最近最好看2019年中文字幕 | 久久AV无码乱码A片无码蜜桃 | 免费成人伦理电影 | 国产中文字幕在线 | 综合免费一区二区三区 | 国产精品无码视频一区二区 | 黄色一级片免费网站 | 网站午夜 | YIN乱大合集未删节TXT下载 | 日本久久久久久久做爰片日本 | 久久视频在线直播 | 日本猛少妇色XXXXX猛叫 | 无码又黄又爽又舒服的A片 无人区AV在线观看 无人区乱码区1卡2卡三卡在线 | 欧美精品狠狠色丁香婷婷 | 一个人在线看www视频 | 娇喘呻吟欲仙欲死的娇妻 | 97精品一区二区视频在线观看 | 日韩色影院 | 99久久亚洲精品日本无码 | 久久福利院 | 亚洲精品中文字幕无码A片蜜桃 | 久久精品国产亚洲AV麻豆 | 免费黄色网址在线观看 | 一本色道久久爱88A 一本色道久久爱88AV | 影音先锋电影资源av | 欧美色欧美亚洲高清在线观看 | 国产精品一在线观看 | 亚洲精品精华液一区 | 日本无翼乌邪恶彩色无摭挡3B | 另类色区 | 亚洲手机在线观看 | 久久久香蕉视频 | 欧美中文字幕在线视频 | 国产乱人对白A片麻豆 | 99热在线精品免费播放6 | 黄色片一级免费 | 国产大片资源中文字幕 | 中文字幕不卡在线播放 | 麻豆精品国产精华液好用吗 | brazzers欧美孕交 | 久久艳妇乳肉豪妇荡乳A片PY | 亚洲精品一区二区三区婷婷月色 | 美美哒韩国直播在线视频 | 国产专区自拍 | 香草影视| 黄色网络在线观看 | 人妻在客厅被C的呻吟 | 九九色精品国偷自产视频 | 把腿张开老子臊烂你小说完整版 | 少妇高潮毛片免费看A片 | 欧美经典人人爽人人爽人人片 | 亚洲欧美日韩国产手机在线 | 色情无码WWW视频无码区下载 | 亚洲AV无码成人一区二区三区 | 国内精品一卡二卡三卡公司 | 免费aⅴ在线 | 国产91网 | 日韩美女在线视频 | 免费黄色欧美 | 学生妹av | s情网站 | 千涩论坛 | 精品欧美亚洲韩国日本久久 | 欧美人与禽ZOZO性伦交视频 | 国产97人妻人人做人碰人人爽 | 在线不卡日本v二区 w006.top | 青青草久草视频 | 色爱综合区 | 免费精品国偷自产在线在线 | 在线视频精品免费观看10 | 免费高清视频免费观看 | 娇喘呻吟欲仙欲死的娇妻 | 香港三级日本三级a视频 | 色噜噜噜AV亚洲男人的天堂 | 成年女人免费播放影院 | 18丝瓜视频| 全色qvod资源网 | 97mitao| 亚洲精品久久久久久久久久无码 | 国产综合在线播放 | 国产精品人妻免费精品 | 古代荡女丫鬟高H辣文纯肉 古代高H啪肉NP文 | 久久国内免费视频 | 一个人看的视频www在线观看免费 | 四虎影视免费在线 | 亚洲精品入口一区二区乱麻豆精品 | 一本在线不卡免费观看 | 久久大蕉香蕉免费 | 国产99久久精品 | AV亚洲AV永久无码精品网 | 夜色贵族图片 | 国产精品乱码久久久久久软件 | 亚洲日本无码高清一区二区 | 大尺度很黄很肉的小说 | 国产又黄又爽又色的免费 | 色中色最新网址 | 日本69色视频在线观看 | 欧美网址在线观看 | 日b在线 | 国语自产拍在线观看偷拍 | 亚洲一级特黄 | 曰曰摸夜夜添夜添A片 | 欧美在线观看 cao38 | 亚洲日韩一区精品射精 | 综合九九 | 日韩免费一级a毛片在线播放一级 | 亚洲精品精华液一区 | 最新精品亚洲成a人在线观看 | 中文字幕一区二区三区精华液 | 久久久国产一区二区三区四区小说 | 久久综合久色欧美综合狠狠 | 天天天天天天干 | 国产中文字幕在线免费观看 | 精品国产青草久久久久福利 | 全黄H全肉短篇禁乱NP | 国产免国产免费 | 国内免费高清在线观看 | 国产亚洲综合一区二区在线 | 8x网站免费入口在线观看 | 一个人看的www高清观看 | 九九精品免费视频 | 欧美www| 97久久伊人精品影院 | 国产午夜视频在线观看 | 韩国成人理伦片免费播放 | 青青草原精品国产亚洲AV | 欧美视频在线观看免费最新 | 日本视频免费看 | 欧美videosex极品hd | 日韩黄网 | 一级片免费在线观看 | 婷婷爱五月 | 色中色最新域名 | 国产chinese在线视频 | 亚洲精品国产国语 | 中文文字幕文字幕亚洲色 | 秋霞电院影无码 | 窝窝午夜在线观看免费观看 | 亚洲AV成人一区二区三区啪啪 | 2022国产成人综合精品 | 男男震蛋电动PLAY道具 | 坐在男人嘴上让他添在线视频 | 国产123区在线视频观看 | 日本aa网站| 亚洲欧洲日韩另类自拍 | 黄色成年人视频 | 中文有码视频在线播放免费 | 欧美日韩免费一区二区三区 | 欧美在线观看一区二区三区 | 欧美日韩高清不卡免费观看 | 四虎影视网站 | 精品人妻伦一二三区久久AAA片 | 亚洲精品久久久久久久蜜桃臀 | 久久久久久久久国产 | 91日本在线观看亚洲精品 | 91福利国产在线观看一区二区 | 狠狠狠狠狠狠狠狠狠狠 | 99国产精品久久人妻无码 | 福利资源在线观看 | 琪琪婷婷五月色综合久久 | 日韩美女视频在线观看 | 男人J桶进女人下部无遮挡A片 | 亚洲人成在线播放 | 在线观看黄网视频免费播放 | 久久九九免费看少妇高潮A片 | 日本喷潮 | 久久天天躁夜夜躁2019 | 看真人视频一级毛片 | 国产一区二区三区四区精华液毛 | jizz.日本| 成人做爰WWW网站视频 | 久久久天堂国产精品女人 | 日本无码成人深夜无码 | 欧美日韩高清一区 | 久久艳妇乳肉豪妇荡乳A片PY | 苍井空免费线在线观看无需下载 | 最近中文字幕高清免费大全1 | 在线视频观看国产 | 国产AV亚洲AV麻豆专区 | 九九精品在线视频 | 日韩免费看| 国产在线观看精品一区二区三区91 | 天天干天天摸天天操 | 日韩欧美不卡在线 | 91精品一区二区三区在线观看 | 天天狠狠干 | 人妻夜夜爽天天爽三区麻豆AV网站 | 重返20岁 下载 | 精品一卡二卡三卡四卡视频区 | 夜夜操狠狠操 | 久久免费视频在线观看6 | 强摸秘书人妻大乳BD | 中国一级毛片视频免费看 | 亚洲影视天堂 | 一女多男nP现代高H 一区二区三区好的精华液杨朝越 | 可以免费观看的电影网 | 久久草情侣vs国产 | 欧美日韩一日韩一线不卡 | 国产麻豆老师在线观看 | 色色成人网 | 日美韩大片高清免费观看 | 久久精品国产99国产精2020丨 | 免费的又色又爽又黄的视频软件 | 欧美日韩亚洲中字二区 | 亚洲精品卡一卡三卡四卡乱码 | 亚洲精美视频 | 好硬啊进得太深了A片无码视频 | 欧美又粗又深又猛又爽A片免费看 | 最近中文字幕完整版视频在线看 | 欧美片免费观看网址 | 亚洲国产高清视频在线观看 | 日本高清不卡在线观看 |