[化] 氢离子指示剂

世界上最伟大的演讲--SHALL WE CHOOSE DEATH?我们该选择死亡吗？

SHALL WE CHOOSE DEATH?我们该选择死亡吗？ I am speaking not as a Briton, not as a European, not as a member of a western democracy, but as a human being, a member of the species Man, whose continued existence is in doubt. The world is full of

发表于:2018-12-07 / 阅读(132) / 评论(0)

世界上最伟大的演讲

太阳科普第6期

The composition of the sun lies in this bar code. 这个条码说明了太阳的组成 All the thin lines are caused by tiny amounts of complex elements 这些细细的线条，都是微量复杂元素造成的 metals like iron and magnesium. 好比说

发表于:2018-12-07 / 阅读(174) / 评论(0)

太阳科普

Uses Hydrogen1 as Fuel2

Broadcast: February 14, 2003 By George Grow This is the VOA Special English Environment Report. President Bush has offered a plan to speed development of technology that uses hydrogen as fuel. His goa

发表于:2018-12-07 / 阅读(168) / 评论(0)

VOA2003（上）-科技导航

我们该选择死亡吗？

I am speaking not as a Briton, not as a European, not as a member of a western democracy, but as a human being, a member of the species Man, whose continued existence is in doubt. The world is full of conflicts: Jews and Arabs; Indians and Pakistanis

发表于:2018-12-12 / 阅读(136) / 评论(0)

英语演讲

CNN 2009-11-25

I couldn't get over this mess. The federal government is confirming what Joan Glickman of Pompano Beach, Florida suspected all along. Tainted drywall from China is giving off a harmful gas that's turning her air-conditioning wiring black, causing it

发表于:2018-12-20 / 阅读(128) / 评论(0)

cnn2009年(十一)月

SSS 2008-08-01

This is Scientific Americans 60-Second Science. I am Cynthia Graber. This will just take a minute. Solar panels typically convert sunlight into electricity or heat. But photosynthetic vegetation converts sunlight into chemical energy. Now M.I.T.s Dan

发表于:2019-01-04 / 阅读(161) / 评论(0)

Scientific American(八)月

VOA慢速英语 2008 1014b

VOICE ONE: This is SCIENCE IN THE NEWS in VOA Special English. I'm Barbara Klein. VOICE TWO: And I'm Steve Ember. This week, we will tell about an American study of the brain disorder schizophrenia. We tell about cars that use hydrogen as fuel. And,

发表于:2019-01-11 / 阅读(187) / 评论(0)

VOA慢速英语2008（十）月

Garlic: The Key to a Long Life?

From VOA Learning English, this is the Health Lifestyle report. Garlic is one of the most common cooking ingredients around the world. Many dishes in Europe, Africa, Asia and the Americas use this strong-flavored vegetable. Garlic is similar to other

发表于:2019-01-12 / 阅读(185) / 评论(0)

2016年VOA慢速英语(十二)月

每日一词【1190】indicator：指示，信号

今天我们要学的词是indicator。 Indicator, 指示，信号。20国集团财长在巴黎开会并达成协议。 The agreement lays out a list of indicators that can be used to monitor the progress made by member countries in reducing imbalanc

发表于:2019-01-25 / 阅读(127) / 评论(0)

英语每日一词

德国开辟生物制氢研究新途径

BERLIN, April 25 (Xinhua) -- A study recently published in the journal Nature Chemical Biology opens up new avenues in biohydrogen research, the Technical University of Berlin (TU Berlin) said on Friday. Scientists at the TU Berlin succeeded in expla

发表于:2019-01-26 / 阅读(111) / 评论(0)

英语新闻

纽约车展上电动汽车来势汹汹

NEW YORK Plug in your car, then unplug, and drive away. More and more consumers are doing just that. At the 2014 New York Auto Show many automakers unveiled electric or hybrid vehicle to address the growing global appetite for environment-friendly ca

发表于:2019-01-30 / 阅读(143) / 评论(0)

英语新闻

2006年VOA标准英语-Analysts: Iran Elections to Gauge President's P

By Gary Thomas Washington 14 December 2006 Iranian woman, wearing the traditional Islamic black veil, looks at campaign posters of female candidate Masoumeh Kolahi, in Tehran, 13 Dec 2006 Iranians are to vote Friday in elections for local government

发表于:2019-01-31 / 阅读(199) / 评论(0)

2006年VOA标准英语（十二月）

VOA标准英语2010年-Website of the Week - World Bank Data

Time again for our Website of the Week, when we showcase interesting and innovative online destinations. The World Bank lends money to promote development, and to help achieve its goals it collects a lot of data. For years, the World Bank has been on

发表于:2019-02-03 / 阅读(162) / 评论(0)

VOA标准英语2010年(五)月

联合国考虑对朝鲜新制裁

SEOUL/WASHINGTONThe U.N. Security Council said Wednesday that it was working to craft new sanctions against North Korea after its latest nuclear test, while the United States and other world powers voiced skepticism about Pyongyang's claim that the u

发表于:2019-02-04 / 阅读(95) / 评论(0)

英语新闻

托福考试：TOEFL模拟试题

Questions 12-20 The elements other than hydrogen and helium exist In such small quantities that it is accurate to say that the universe somewhat more than 25 percent helium by weight and somewhat less than 25 percent hydrogen. Astronomers have measur

发表于:2019-02-05 / 阅读(169) / 评论(0)

托福英语

雅思单词前缀整理

PREFIX 1.a-:of;on;intensive;negative,not,without;ad-;ab-. 2.ab-:away from,off. 3. ad-:to;at;for. 4. aer(o)- :relating to air . 5.al-:all. 6.ambi-:on both sides,around. 7.amphi-:on both sides,around. 8.an-:negative,not,without. 9.ana-:upon,up,on. 10.a

发表于:2019-02-06 / 阅读(179) / 评论(0)

雅思英语

我们该选择死亡吗

December 30, 1954 I am speaking not as a Briton, not as a European, not as a member of a western democracy, but as a human being, a member of the species Man, whose continued existence is in doubt. The world is full of conflicts: Jews and Arabs; Indi

发表于:2019-02-09 / 阅读(182) / 评论(0)

英语美文

各种花样的风筝怎么说？

9月16日是墨西哥馆日，墨西哥馆五颜六色的风筝森林吸引了不少人的眼球，你知道小小的风筝里有什么大学问吗？其实风筝也有很多种分类哦，一起来看看吧。说到kite这个单词，这也许是我们

发表于:2019-02-18 / 阅读(197) / 评论(0)

英语口语

朝鲜宣布成功进行首次氢弹试验

North Korea conducted a 'successful' hydrogen bomb test, Pyongyang has confirmed. The thermonuclear weapon triggered a massive 5.1 magnitude earthquake when it exploded at 10am local time on Wednesday. 平壤方面已经证实，朝鲜成功的进行了

发表于:2019-02-18 / 阅读(114) / 评论(0)

英语新闻

万物简史第383期:浩瀚的海洋(2)

Almost nothing about it can be used to make reliable predictions about the properties of other liquids and vice versa. 它的身上几乎没有哪一点可以用来对别的液体的性质进行可靠的推测，反之亦然。 If you knew nothing of

发表于:2019-02-25 / 阅读(127) / 评论(0)

万物简史

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