标签：水和酒精分子 相关文章

VOA常速英语2017--攻克摩苏尔之战异常艰辛

The Iraqi army, backed by helicopters, advanced on western Mosul and pushed into the area around the al-Nuri mosque. 伊拉克军队在直升机的支持下，进军到了摩苏尔西部，并推进到了努尔大清真寺(al-Nuri Mosque)。 Taking t

发表于:2018-12-08 / 阅读(146) / 评论(0) 分类 VOA标准英语2017年(四月)

TED演讲：气味背后的科学(10)

Now, coumarin is a very common thing, a material, in fragrance which is derived from a bean that comes from South America. 香豆素是香水中一个十分平常的原料，从来自南美的豆子中提炼出来的。 And it is the classic syntheti

发表于:2018-12-19 / 阅读(64) / 评论(0) 分类 TED演讲教育篇

TED演讲：气味背后的科学(3)

This smells of cut grass. Now, this is the skeleton of the molecule. 它闻起来就像割下来青草。这就是分子的骨架。 If you dress it up with atoms, hydrogen atoms -- that's what it looks like when you have it on your computer -- but a

发表于:2018-12-19 / 阅读(45) / 评论(0) 分类 TED演讲教育篇

TED演讲：气味背后的科学(5)

And...but...but...we have to go a little beyond that. 我们需要进一步深入。 Now let me explain why vibrational theory has some sort of interest in it. 现在我来解释为什么震动理论有一定的道理。 These molecules, as you saw i

发表于:2018-12-19 / 阅读(52) / 评论(0) 分类 TED演讲教育篇

TED演讲：气味背后的科学(6)

So I went searching when I started in this game to convince myself that there was any degree of plausibility to this whole crazy story. 在这个游戏的最初，我就开始寻找说服我自己，这个理论有一定的合理性，这整个故事有

发表于:2018-12-19 / 阅读(52) / 评论(0) 分类 TED演讲教育篇

TED演讲：气味背后的科学(8)

OK, great, we smell vibrations. How? All right? 好吧，我们闻到的是震动。怎么闻到呢？ Now when people ask this kind of question, they neglect something, which is that physicists are really clever, unlike biologists. 当人们问这个问

发表于:2018-12-19 / 阅读(53) / 评论(0) 分类 TED演讲教育篇

减肥瘦身英语口语话题 第14期:使用搅打过的奶油或麦淇淋

Unit 14 Use whipped butter or margarine. Unit 14 使用搅打过的奶油或麦淇淋 As much as youre trying to cut down on your fat intake,some things just dont taste right without a little bit of butter or margarine.Go ahead and spread，but use t

发表于:2018-12-26 / 阅读(61) / 评论(0) 分类 减肥瘦身英语口语话题

每日一词【143】in tatters：衣服等破烂不堪

今天我们要学的词组是in tatters。 In tatters指衣服等破烂不堪。比如有人衣衫褴褛 -- His clothes are in tatters. In tatters也指事情处于崩溃状态。 比如西班牙的巴斯克分离主义分子在马德里机场制造爆

发表于:2018-12-30 / 阅读(68) / 评论(0) 分类 英语每日一词

TED演讲:个体DNA检测的时代来了(2)

DNA is the fundamental molecule the carries genetic instructions that help build the living world. DNA是携带遗传指令最基本的分子，帮助建造了生机勃勃的世界。 Humans have DNA. Pigs have DNA. Even bacteria and some viruses hav

发表于:2019-01-03 / 阅读(60) / 评论(0) 分类 TED演讲科技篇

SSS 2011-08-04

This is Scientific Americans 60-Second Science. Im Sophie Bushwick. Got a minute? The carbon molecule known as a buckyball, a member of the fullerene family, can act as a cage for a variety of other chemicals. And now researchers have used one to tra

发表于:2019-01-08 / 阅读(54) / 评论(0) 分类 Scientific American(八)月

美联社新闻一分钟 AP 2014-10-23

1. Officials say 43 of 48 people on an original Ebola watch list in Texas have passed the 21-day maximum incubation period for the virus, and are now in the clear. 2. In a significant shift, Turkeys Foreign Minister announced Monday that they will he

发表于:2019-01-11 / 阅读(102) / 评论(0) 分类 美联社新闻一分钟2014(十)月

122 哈马斯激进分子遭绑架

122 哈马斯激进分子遭绑架 Hamas Activist Abducted Art Chimes Jerusalem 8 Jul 2001 15:07 UTC Clashes continued in Rafah, at the southern end of the Gaza Strip, where an 11-year-old Palestinian

发表于:2019-01-16 / 阅读(513) / 评论(0) 分类 VOA2001-国际风云（2）

经济学人310:表观遗传学与健康 祖母的诅咒

Science and technology 科学技术 Epigenetics and health 表观遗传学与健康 Grandma's curse 祖母的诅咒 Some of the effects of smoking may be passed from grandmother to grandchild 祖母吸烟产生的影响可以会遗传至孙子或孙女

发表于:2019-01-28 / 阅读(42) / 评论(0) 分类 经济学人科技系列

105 以色列坚持其所谓的“积极防卫”政策

105 以色列坚持其所谓的“积极防卫”政策 Israel to Continue 'Active Defense'Art Chimes Jerusalem 4 Jul 2001 14:23 UTC Israel will continue its 1)controversial policy of targeted attacks

发表于:2019-01-31 / 阅读(173) / 评论(0) 分类 VOA2001-国际风云（2）

每日一词【243】hole up：躲藏，隐藏

今天我们要学的词是hole up。 Hole up是躲藏，隐藏的意思。The escaped convict holed up in the basement of a deserted house, 意思是这名逃犯躲在一个空房子的地下室里。 巴基斯坦部队星期二向伊斯兰堡的红色

发表于:2019-02-05 / 阅读(49) / 评论(0) 分类 英语每日一词

美联社新闻一分钟 2008-05-13

1. Rescue workers in central China are frantically searching for survivors in rubble like this. Heavy rain continues to fall in the area after a 7.9-magnitude earthquake killed about 10,000 people. Chinese officials say there is a push to clear road

发表于:2019-02-11 / 阅读(127) / 评论(0) 分类 美联社新闻一分钟2008年(五)月

美联社新闻一分钟 AP 2014-10-14

1. A stepped up of Ebola program that checks temperature of travellers arriving from West Africa, is starting in New York John F. Kennedy International Airport. Over the next week, screenings will expand to Newark Liberty, Washington Dulles, Chicago

发表于:2019-02-12 / 阅读(106) / 评论(0) 分类 美联社新闻一分钟2014(十)月

万物简史 第216期:把铅撵出去(5)

Chlorofluorocarbons are also not very abundantthey constitute only about one part per billion of the atmosphere as a wholebut they are extravagantly destructive. One pound of CFCs can capture and annihilate seventy thousand pounds of atmospheric ozon

发表于:2019-02-17 / 阅读(54) / 评论(0) 分类 万物简史

双语有声阅读：氢与工业

Hydrogen and Industries Hydrogen,the lightest and simplest of the elements, has several properties that make it valuable for many industries. It releases more heat per unit of weight than any other fuel.In rocket engines, tons of hydrogen and oxygen

发表于:2019-02-17 / 阅读(50) / 评论(0) 分类 双语有声阅读

双语有声阅读：Bacteria

48 Bacteria Bacteria are extremely small living things. While we measure our own sizes in inches or centimeters, bacterial size is measured in microns. One micron is a thousandth of a millimeter: a pinhead is about a millimeter across. Rod-shaped bac

发表于:2019-02-17 / 阅读(68) / 评论(0) 分类 双语有声阅读
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