国产精品久久久久久二区_久久精品手机视频_久久99精品久久久久久噜噜_久久久久亚洲精品_国产高清视频在线观看_成人免费视频一区二区

Zero sum game

雕龙文库 分享 时间: 收藏本文

Zero sum game

Reader question:

In this sentence – Globalization is not a zero sum game but a great opportunity for all – what does "zero sum game" mean?

My comments:

Sum means total, as in sum total. Zero-sum means it all adds up to naught.

A zero-sum game is one in which gains and losses cancel each other out, i.e. someone winning something comes at the expense of somebody else's losing. To make your winning possible, somebody has to lose that something you're winning.

Let's say you're playing Chinese chess and you gain ground by eating, as it were, one of your opponent's pawns. You gain (an advantage of) a pawn, he loses one. He eats one of your horses – he gains a horse (in advantage), you lose a horse. You win a game, he loses a game. You can't win a game without him losing one. You are good. Better than your opponent is, that is, and you win ten games in a row. He loses ten in a row (to make your winning possible).

You say, hey, that's great, I like this game. I win all the time. I like winning all the time.

Well, if that's what you like, you're on your way to suffer because one, you're not going to win all games in life all the time; two, if you win all the time it's no competition – where's fun of competition when there's no competition?

So, what you do is you shift attention from winning (or losing) to simply playing the game – and not get attached to outcome. Only then are you able to enjoy the fact that you're getting better from the practice – becoming a better player with each game played, win or lose – and keep getting closer to reaching your full potential (which in turn keeps growing of course just to stay out of your reach).

And if your opponent did the same, both of you would escape your karma – the sorry fate of suffering the joy of winning and the pain of losing.

Esoteric? Well, definitely we're drifting – let's get back to, er, globalization.

When globalization is described as a zero-sum game, it means that gains by some countries are cancelled out by losses by other countries. For example, if Nike, the sports gear maker, shifts one of its shoe shops from, say, Mexico to Indonesia, the latter gains an extra business. But gains made by Indonesians are offset by the loss of the same business in Mexico. That's why globalization becomes a zero-sum game for, say, countries which have little more than cheap labor to offer (and to be exploited).

But if, say, China exports wheat, supposing we have an excess of it (which we don't, of course – it sometimes seems we, too, only have an excess of cheap labor) to Ecuador and gets bananas back, supposing Ecuador has an excess of bananas, then it becomes what politicians call a win-win situation.

If you listen to politicians these days, you hear they are turning every piece of deal into a win-win situation for all parties involved – all winners and no losers. You hope they know what they are talking about, of course.

Anyways, here are more media examples on "zero-sum game":

1. "Google has records that could help in a cyber-investigation, he said," Wright adds. "Giorgio warned me, 'We have a saying in this business: 'Privacy and security are a zero-sum game.'"

A zero-sum game is one in which gains by one side come at the expense of the other. In other words – McConnell's aide believes greater security can only come at privacy's expense.

- US drafting plan to allow government access to any email or Web search, rawstory.com, January 14, 2008.

2. "We have a saying in this business: 'Privacy and security are a zero-sum game.'" Thus spake security consultant Ed Giorgio in a widely-quoted New Yorker article on the US intelligence community's plans to vacuum up and sift through everything that flies across the wires. But Giorgio is wrong—catastrophically wrong. The story of Fidencio Estrada, a drug runner who bribed Florida Customs agent Rafael Pacheco to (among other things) access multiple federal law enforcement databases on his behalf, suggests that when it comes to the government collecting data on innocent civilians for law enforcement purposes, privacy and security are essentially the same thing.

- Analysis: Metcalfe's Law + Real ID = more crime, less safety, arstechnica.com, January 19, 2008.

3. Bush's woefully misguided invasion and occupation of Iraq in 2003, carried out under false pretences, has not only drained the United States treasury, but reduced Washington's standing in the Middle East in a way not yet fully grasped by most commentators. Whereas Washington once played off Tehran against Baghdad, while involved in a superpower zero-sum game with the Soviet Union, the Bush administration is now engaged in a zero-sum game, as a virtual equal, with Iran. That is, America's loss has become Iran's automatic gain, and vice-versa.

- Bush in a zero-sum Iranian game of his own making, arabamericannews.com, December 9, 2007.

4. Zero-sum game

When the gains made by winners in an economic transaction equal the losses suffered by the losers. It is identified as a special case in GAME THEORY. Most economic transactions are in some sense positive-sum games. But in popular discussion of economic issues, there are often examples of a mistaken zero-sum mentality, such as "PROFIT comes at the expense of WAGES", "higher PRODUCTIVITY means fewer jobs", and "IMPORTS mean fewer jobs here".


Reader question:

In this sentence – Globalization is not a zero sum game but a great opportunity for all – what does "zero sum game" mean?

My comments:

Sum means total, as in sum total. Zero-sum means it all adds up to naught.

A zero-sum game is one in which gains and losses cancel each other out, i.e. someone winning something comes at the expense of somebody else's losing. To make your winning possible, somebody has to lose that something you're winning.

Let's say you're playing Chinese chess and you gain ground by eating, as it were, one of your opponent's pawns. You gain (an advantage of) a pawn, he loses one. He eats one of your horses – he gains a horse (in advantage), you lose a horse. You win a game, he loses a game. You can't win a game without him losing one. You are good. Better than your opponent is, that is, and you win ten games in a row. He loses ten in a row (to make your winning possible).

You say, hey, that's great, I like this game. I win all the time. I like winning all the time.

Well, if that's what you like, you're on your way to suffer because one, you're not going to win all games in life all the time; two, if you win all the time it's no competition – where's fun of competition when there's no competition?

So, what you do is you shift attention from winning (or losing) to simply playing the game – and not get attached to outcome. Only then are you able to enjoy the fact that you're getting better from the practice – becoming a better player with each game played, win or lose – and keep getting closer to reaching your full potential (which in turn keeps growing of course just to stay out of your reach).

And if your opponent did the same, both of you would escape your karma – the sorry fate of suffering the joy of winning and the pain of losing.

Esoteric? Well, definitely we're drifting – let's get back to, er, globalization.

When globalization is described as a zero-sum game, it means that gains by some countries are cancelled out by losses by other countries. For example, if Nike, the sports gear maker, shifts one of its shoe shops from, say, Mexico to Indonesia, the latter gains an extra business. But gains made by Indonesians are offset by the loss of the same business in Mexico. That's why globalization becomes a zero-sum game for, say, countries which have little more than cheap labor to offer (and to be exploited).

But if, say, China exports wheat, supposing we have an excess of it (which we don't, of course – it sometimes seems we, too, only have an excess of cheap labor) to Ecuador and gets bananas back, supposing Ecuador has an excess of bananas, then it becomes what politicians call a win-win situation.

If you listen to politicians these days, you hear they are turning every piece of deal into a win-win situation for all parties involved – all winners and no losers. You hope they know what they are talking about, of course.

Anyways, here are more media examples on "zero-sum game":

1. "Google has records that could help in a cyber-investigation, he said," Wright adds. "Giorgio warned me, 'We have a saying in this business: 'Privacy and security are a zero-sum game.'"

A zero-sum game is one in which gains by one side come at the expense of the other. In other words – McConnell's aide believes greater security can only come at privacy's expense.

- US drafting plan to allow government access to any email or Web search, rawstory.com, January 14, 2008.

2. "We have a saying in this business: 'Privacy and security are a zero-sum game.'" Thus spake security consultant Ed Giorgio in a widely-quoted New Yorker article on the US intelligence community's plans to vacuum up and sift through everything that flies across the wires. But Giorgio is wrong—catastrophically wrong. The story of Fidencio Estrada, a drug runner who bribed Florida Customs agent Rafael Pacheco to (among other things) access multiple federal law enforcement databases on his behalf, suggests that when it comes to the government collecting data on innocent civilians for law enforcement purposes, privacy and security are essentially the same thing.

- Analysis: Metcalfe's Law + Real ID = more crime, less safety, arstechnica.com, January 19, 2008.

3. Bush's woefully misguided invasion and occupation of Iraq in 2003, carried out under false pretences, has not only drained the United States treasury, but reduced Washington's standing in the Middle East in a way not yet fully grasped by most commentators. Whereas Washington once played off Tehran against Baghdad, while involved in a superpower zero-sum game with the Soviet Union, the Bush administration is now engaged in a zero-sum game, as a virtual equal, with Iran. That is, America's loss has become Iran's automatic gain, and vice-versa.

- Bush in a zero-sum Iranian game of his own making, arabamericannews.com, December 9, 2007.

4. Zero-sum game

When the gains made by winners in an economic transaction equal the losses suffered by the losers. It is identified as a special case in GAME THEORY. Most economic transactions are in some sense positive-sum games. But in popular discussion of economic issues, there are often examples of a mistaken zero-sum mentality, such as "PROFIT comes at the expense of WAGES", "higher PRODUCTIVITY means fewer jobs", and "IMPORTS mean fewer jobs here".


主站蜘蛛池模板: 日韩中文字幕一区二区三区 | 国产精品久久久久久久久久 | 91精品久久久久久粉嫩 | 亚洲精品在线免费 | 久久视频免费观看 | 欧美一区二区三区视频 | 在线中文字幕 | 免费网站观看www在线观 | 精品视频久久 | 伊人久久中文字幕 | 91免费国产| 亚州精品视频 | 日韩不卡一区二区 | 久久一区精品 | av手机在线看 | 黄色片在线 | 免费国产黄色 | 特黄一级视频 | 黄色精品 | 一区二区三区四区免费视频 | 日韩在线不卡 | 黄色免费毛片 | 91视频色 | 一级特黄毛片 | 国产第五页 | 天堂影院av | 欧美亚洲一区二区三区 | 91久久国产综合久久91 | 日韩av成人在线 | 春色导航| 黄色片网站视频 | 国产三级黄色片 | 中文字幕日韩高清 | 国产成人精品一区二区三区福利 | 免费在线观看黄色片 | 日韩精品黄 | 免费一区二区三区 | 91久久国产综合久久91精品网站 | 国产精品高潮呻吟久久 | 高潮毛片无遮挡免费看 | 黄色片毛片 | 老女人丨91丨九色 | 国产区在线视频 | 国产在线黄色 | 爱爱免费网站 | 天天视频黄| 国产精品第二页 | 伊人久久中文字幕 | 久久国产一区 | 国产网站视频 | a天堂视频 | 精品亚洲一区二区 | 手机av在线 | 欧美午夜精品久久久久免费视 | a在线视频 | 99视频网| www婷婷| www.中文字幕 | 国产福利在线播放 | 日本黄色录像 | 国产精品视频一区二区三区 | 国产精品aaa | 亚洲一区二区三区在线播放 | 欧美视频在线观看 | 国产三级在线免费观看 | 免费在线成人网 | 欧美日韩国产精品 | 一级黄色免费视频 | 中文字幕一区在线观看 | 99这里有精品| 成人午夜小视频 | 亚洲国产福利 | 午夜在线观看免费视频 | 欧美mv日韩mv国产网站 | 一区二区三区在线播放 | 午夜视频免费 | 色黄大色黄女片免费中国 | 国产福利在线视频 | 午夜av免费 | 国产精品黄色 | 国产男女视频 | 乳色吐息樱花 | 中文字幕视频 | 黄色录像免费观看 | 成人免费公开视频 | 日韩欧美一区二区在线 | 国产成人在线视频 | 国产超碰人人模人人爽人人添 | 亚洲精品911 | 亚洲一级特黄 | 国产精品国产精品国产专区不卡 | 国产一级黄色大片 | 亚洲欧洲视频 | 久久久久免费视频 | 91成人在线观看喷潮 | 人人干人人爱 | 伊人久久久 | 精品久久久久久久久久久 | 婷婷视频在线 | 日本视频在线免费观看 | 99精品欧美一区二区蜜桃免费 | 久久五月婷 | 日韩一级二级三级 | 国内精品偷拍 | 欧美伦理一区二区 | 亚洲最新视频 | 在线观看欧美日韩 | 日本人の夫妇交换 | 国产精品一级二级 | 久久av片| 久久免费视频网站 | 青青草久久 | 中文字字幕在线 | 国产三级黄色片 | 久久国产精品免费视频 | 四虎影视在线 | 丁香婷婷在线 | 国产高清在线观看 | 亚欧在线观看 | 在线免费看a | 日韩欧美一区二区三区四区 | 在线观看的av网站 | 亚洲一区二区三区视频 | 91丨九色丨蝌蚪丨丝袜 | 国产免费一区 | 国产一区二区网站 | 天堂色av | 国产精品欧美一区二区 | 国产三级精品视频 | 久久久成人网 | 成年人午夜视频 | 色妞网| 日韩一区在线视频 | 日本在线免费观看 | 影音先锋在线观看视频 | 欧美网站在线观看 | 九九久久精品视频 | 国产无遮挡又黄又爽又色 | 成人黄色一级片 | 久久香蕉精品 | 国产激情视频 | 91亚洲精选| 成人在线小视频 | 欧美日韩中文在线 | 91成人免费 | 久久亚洲精品视频 | 色噜噜狠狠一区二区三区 | 中文天堂av | 中文字幕在线日韩 | 日韩精品国产一区 | 国产1区2区| 亚洲成人免费视频 | 成年人免费看片 | 国产伦精品一区二区 | 国产永久免费视频 | 欧美激情国产精品 | 免费一区二区 | av福利在线 | 久久久精品国产sm调教网站 | 黄色精品视频 | 国产逼逼 | 国产黄网| 91精品国产一区二区三区 | 日本少妇高潮达到高潮 | 欧美资源在线 | 日韩一区二区三区四区 | 97国产超碰 | 自拍偷拍一区二区三区 | 国 产 黄 色 大 片 | 成人h片在线观看 | 欧美一区二区三 | 看片地址| 国产福利网站 | 91在线小视频| 日本少妇高潮达到高潮 | 伊人春色av| 五月天婷婷激情网 | 国产精品美女久久久久久久久 | 国产三级在线播放 | 亚洲日本一区二区 | 日韩av在线免费 | 91激情 | 欧美午夜在线 | 极品av在线 | 久久精品在线播放 | 一级片aa | 黄色a一级片 | 欧美人与性动交α欧美精品 | 亚洲成人三级 | av狠狠干| 在线看成人片 | 天天干一干 | 老女人毛片 | 放几个免费的毛片出来看 | 欧美日韩免费一区二区三区 | 成人黄色小视频 | 日韩中文字幕在线观看 | 中文字幕国产精品 | 亚洲激情在线观看 | 国产三区四区 | 日本三级一区 | 自拍偷拍第五页 | 亚洲午夜视频在线观看 | 中文字幕免费在线看线人动作大片 | 欧美精品一区二 | 中日韩毛片| 91在线视频 | 五月婷婷在线观看 | 偷拍福利视频 | 免费一区二区三区 | 夜夜夜夜操| 欧美亚洲国产精品 | 日日夜夜综合 | 一区二区三区四区在线播放 | 免费一区二区三区 | 毛片资源| 国产美女av| 欧美在线视频免费 | 黄色av毛片| 国产精品视频一区二区三区 | 天天看天天射 | 欧美激情视频一区 | 97国产在线 | 欧美视频三区 | 99视频+国产日韩欧美 | 成人在线视频免费 | 成人综合婷婷国产精品久久 | 日韩理论在线 | 日韩av网站在线观看 | 一区二区三区欧美日韩 | 免费在线观看黄色片 | 91视频在线观看视频 | 成人在线国产 | 国产一区二区免费看 | 日本在线观看一区 | 激情丁香婷婷 | 亚洲黄色小视频 | 一本色道久久综合亚洲精品酒店 | 99小视频 | 91视频在| 99re在线 | 亚洲视频一区在线观看 | 一区二区网站 | 欧美一级在线视频 | 在线成人免费 | 中文字幕亚洲综合 | 久久动态图 | 少妇高潮av久久久久久 | 黄色一级影片 | 在线看成人片 | 国产精品手机在线观看 | 香蕉视频在线免费看 | 日韩在线中文字幕 | 亚洲天堂影院 | 91久久久久久久久 | 亚洲高清在线视频 | 精品免费视频 | 亚洲视频在线视频 | www.欧美精品| 99精品视频在线观看 | 日本一级淫片色费放 | 欧美一级片在线 | 五月婷婷丁香综合 | 青青青草视频在线观看 | 视频在线一区 | 91精选视频 | 精品伊人久久 | 一区二区国产精品 | 午夜影院免费 | 九九精品在线视频 | 成人激情在线观看 | 久久一区| 一区二区三区视频 | 欧美裸体视频 | 亚洲精品91天天久久人人 | 黄色小视频免费 | 在线观看的av | 99久久精品国产一区二区成人 | 黄色免费在线视频 | 日韩欧美视频一区 | 欧美精品一区在线 | 在线观看网址你懂的 | 日本久久久久久久久 | 欧美一区在线视频 | 欧美激情一区二区三区 | 亚洲欧美另类在线 | 高清无码| 天天躁日日躁狠狠躁 | 亚洲黄色在线视频 | 秋霞午夜鲁丝一区二区老狼 | 精品国产999久久久免费 | 快播少女爱欢乐 | 亚洲欧洲在线观看 | 国产传媒一区二区 | 国产精品毛片va一区二区三区 | 亚洲小视频在线观看 | 国产精品成人一区二区 | 国产精品99久久久久久www | 国产精品尤物 | 黄色a毛片| 欧美成人综合 | 国产乱人乱偷精品视频 | 中文字幕av网站 | 最新日韩在线 | 激情网站在线观看 | 黄色在线观看网址 | 欧美理论片在线观看 | 在线黄色av | 国产成人小视频 | 久久亚洲免费视频 | 18视频在线观看 | 黄色激情网站 | 三级在线播放 | 日本在线观看一区 | 黄色免费av | 欧美视频精品 | 欧美a在线 | 欧美色图在线视频 | 亚洲成人中文字幕 | 色综合婷婷 | 男人天堂网在线 | 黄色小说视频网站 | 欧美一级片在线播放 | 免费看的毛片 | 一区二区在线免费观看 | 最新av在线播放 | 久久精品在线 | 不卡中文字幕 | 国产一级片免费观看 | www.桃色av嫩草.com| 亚洲性天堂 | 午夜激情小视频 | 亚洲天堂网在线观看 | 99视频+国产日韩欧美 | 欧美综合一区二区三区 | 成人做受黄大片 | 欧美精品久久久久久久多人混战 | 色婷婷精品国产一区二区三区 | 欧美国产一区二区 | 一级片免费网站 | 久久精品国产一区 | 色av网| 香蕉视频一区二区 | 欧美日韩在线一区 | 四虎av| 国产成人精品亚洲 | yy6080午夜| 激情五月综合 | 不卡视频在线观看 | 亚洲精品一级 | 亚洲欧美日韩一区 | 毛片av在线 | 国产欧美成人 | 黄色成人在线 | 日韩a在线观看 | 色黄大色黄女片免费中国 | 久久久久久久综合 | 中文字幕第5页 | 可以免费看黄的网站 | 久久福利视频导航 | 黄色免费大片 | 一级片在线播放 | 精品国产一二三区 | 黄色一级大片在线免费看产 | 国v精品久久久网 | 亚洲一区二区 | 欧美色偷偷 | 黄色录像免费看 | 国产永久在线 | 色爽av| 午夜网站在线观看 | 综合伊人久久 | 992tv在线| 午夜无遮挡 | 欧美另类视频 | 91导航| 久久久久久中文字幕 | 九色精品 | 黄色片网站免费 | 国产在线一区二区 | 久久久97| 破处视频在线观看 | 曰本一级片 | 偷拍一区二区三区 | 国产日韩欧美日韩大片 | 四虎8848精品成人免费网站 | 日本黄色中文字幕 | 日本在线 | 欧美 日韩 国产 成人 在线 | 国产黄网| 国产精品亚洲一区 | 91一级片| 久久久久久毛片 | 神马午夜影院 | 久久久久久网站 | 欧美午夜精品久久久久免费视 | 日日操av | 在线观看中文字幕码 | 成人网战| 欧美日韩精品 | 久久天天 | 瑟瑟视频在线观看 | 亚洲第一毛片 | 一区二区三区日韩 | 麻豆国产91 | 亚洲午夜一区 | 黄色国产| 天天躁日日躁bbbbb | 一级欧美一级日韩 | 国产欧美视频在线观看 | 国产专区在线播放 | 日韩黄色在线视频 | 精品无人国产偷自产在线 | 日本在线免费视频 | 国产成人免费在线视频 | 国产精品一区二区在线播放 | 中文字幕精品在线观看 | 久久99九九 | 精品一区二区三区四区 | 日韩一级大片 | 一级黄视频 | 精品国产乱码久久久久久88av | 欧美日韩中文在线 | 538精品视频 | 亚洲免费小视频 | 天天精品视频 | 久久99精品久久久久久琪琪 | 91成人国产 | 91黄视频 | 黄色片视频网站 | 国产www视频 | 亚洲影院一区 | 午夜激情福利 | 亚洲久久久 | 福利网站在线观看 | 亚洲人成免费 | 蜜桃成人在线 | 青青草av | 国产激情视频在线 | 一级黄色片视频 | 亚洲欧美日韩综合 | 激情小说在线视频 | 在线播放成人 | 日韩欧美在线一区 | 国产精品国产精品国产专区不片 | 中文字幕在线免费观看 | www.亚洲天堂 | 国产一级二级三级 | 久草精品视频在线看网站免费 | 精品网站999www | 国产精品爽爽爽 | 91国产视频在线观看 | 久久免费影院 | 日韩一区二区在线观看视频 | 国产精品一区一区三区 | 久久黄视频 | 国产一区二区三区在线视频 | 国产精品原创 | 欧美 日韩 国产 成人 在线 | 亚洲精品在线看 | 日韩不卡免费视频 | 日韩午夜在线观看 | 亚洲黄色一级 | 中文字幕综合 | 国产精品视频久久 | 国产三级在线观看 | 国产h视频在线观看 | 国产一区不卡 | 韩国精品一区 | 久久免费视频网站 | 96精品| 国产裸体永久免费视频网站 | 91av视频在线 | 日韩午夜影院 | 成人小视频在线观看 | 欧美性生交xxxxx久久久 | 水蜜桃一区二区 | 99精品久久久 | 久久久久久久成人 | 成人免费av | 福利视频1000| 免费av网站在线观看 | 天堂久久久久 | 欧美a一级 | 日韩免费网站 | 91蜜桃在线观看 | 久久免费观看视频 | 欧美一级艳片视频免费观看 | 中文字幕在线网站 | 亚洲iv一区二区三区 | av福利在线观看 | 一级久久 | 久久精品1| 少妇特黄a一区二区三区 | 久久青青操 | 精品国产va久久久久久久 | 国产嫩草视频 | 97青青草 | 日韩不卡在线 | 午夜精品久久 | 这里只有精品视频在线观看 | 国内自拍偷拍 | 日日夜夜精品免费 | 亚洲精品一二三区 | 亚洲精品影院 | 国产涩涩 | 成人黄色免费 | 天天干女人 | 欧美日韩色| 18成人免费观看网站 | 天天操夜夜操狠狠操 | 亚洲国产日本 | 日本欧美在线 | 国产视频福利 | 色姑娘综合| 成人免费毛片入口 | 精品国产一区二 | 好色综合 | 国产成人99久久亚洲综合精品 | 国产成人亚洲精品自产在线 | 爱情岛论坛av | 亚洲精品久久久久久久久 | 精品国产99久久久久久宅男i | 成人一级视频 | 日本伊人网 | 日韩视频在线观看免费 | 日韩精品小视频 | 天天操天天干天天操 | 青青草在线播放 | 国产激情网站 | 国产一级在线观看 | 亚洲黄色精品 | 日本免费黄色网址 | 91二区| 啪啪免费网站 | 色婷婷导航 | 中文字幕丰满人伦在线 | 亚洲精品在线视频观看 | 人人爱人人草 | 日韩精品小视频 | 国产精品一区二区三区免费 | 999av| av片在线观看 | 亚洲精品一区中文字幕乱码 | 免费视频a | 日韩精品视频网站 | 一区二区国产在线 | 亚洲视频在线看 | 成人福利在线观看 | 亚洲精品网站在线观看 | 国产一区二区免费在线观看 | 国产成人在线播放 | 久久一区精品 | 久草综合网 | 午夜免费福利视频 | 一区二区三区国产 | 亚洲第一区在线观看 | 亚洲激情在线视频 | 日韩视频一区二区三区 | 国产精品久久久久久久久久 | 国产黄a三级三级三级看三级男男 | 偷偷操不一样 | 国产免费网址 | 日韩精品免费视频 | 天天操天天看 | 手机看片福利视频 | 日韩在线不卡视频 | 亚洲激情网站 | 91看片淫黄大片 | 在线播放亚洲 | 亚洲精品一区二区三区精华液 | 久久久久久国产精品 | 日本少妇做爰全过程毛片 | 亚洲精品999| 成人欧美一区二区三区白人 | 91麻豆产精品久久久久久夏晴子 | 国产成人精品在线观看 | 草逼视频免费看 | 亚洲午夜18毛片在线看 | 张津瑜国内精品www在线 | 性色av一区二区三区 | 色羞羞| 毛片在线观看视频 | 天堂а√在线中文在线新版 | 欧美一级特黄aa大片 | 国产又粗又猛又黄又爽无遮挡 | 在线观看日本 | 福利片在线 | 亚洲精品久久久久 | 亚洲欧美日韩另类 | 五月在线视频 | 日日日干干干 | 福利在线播放 | 日本黄色免费视频 | 黄色片视频在线观看 | 可以免费看黄的网站 | 亚洲丝袜一区 | 一区二区三区高清 | 九色在线视频 | 日本精品网站 | av观看免费 | 亚洲视频在线看 | 午夜免费av| 日日操天天操 | 久久久久国产视频 | 国产午夜视频在线观看 | 草草网 | 一级做a爰片久久毛片潮喷 视频一二区 | 午夜在线 | 国产精品入口夜色视频大尺度 | 欧美国产日韩视频 | 日韩在线视频网站 | 日本中文在线观看 | 国产三级久久 | 成人av一区|