un. 焊缝金属氢水平
[网络] 焊缝的氢水平；焊缝氢位准

用mp3背四级单词65

rtue 美德，德行 virus 病毒 vision 幻想，视觉 vital 极其重要的 vivid生动的，鲜艳的 volcano火山 voltage 电压 voluntary自愿的，志愿的 volunteer志愿者 vote票，选票 wage 工资，报酬 wagon四轮马车，大棚车 wander漫游，漫步 waterproof 防水的，不透水的 wealth

发表于:2018-11-29 / 阅读(410) / 评论(0)

用mp3背四级单词

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(307) / 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(349) / 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(335) / 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(275) / 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(267) / 评论(0)

cnn2009年(十一)月

商务口语第67讲:制造工程(2)

1.Computer-Aided Manufacturing(CAM) 计算机辅助制造 A: Is CAM used in China? B: Yes，it has been uesd in China for almost twenty years. A：在中国有使用CAM的吗？ B：有啊，在中国使用已经将近20年了。 2.Hot working 热加工 A: What are the hot working proc

发表于:2018-12-26 / 阅读(342) / 评论(0)

天天商务口语

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(310) / 评论(0)

Scientific American(八)月

雅思考试背单词方法之异构法

异构是相对于同构而言的。异构词是指在拼写上只相差一两字母的两个或几个单词，若异构词里有一个是我们所熟悉的，就可以拿来记忆其他不熟悉的异构词（GRE单词）。异构法最适合记忆中

发表于:2019-01-18 / 阅读(344) / 评论(0)

雅思英语

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(277) / 评论(0)

英语新闻

流行美语第123课 - to level with someone / clueless

Larry和李华正在乘公共汽车去公园去溜冰。今天李华会学到两个常用语：to level with someone和clueless. (Local traffic) LL: I have to level with you, Li Hua. I'm not very fond

发表于:2019-01-31 / 阅读(311) / 评论(0)

美国之音《流行美语》

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(277) / 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(339) / 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(335) / 评论(0)

雅思英语

2005年考研新增词汇详解-20

underlie vt.位于...之下, 成为...的基础 vein n.血管, 静脉, 叶脉, 翅脉, 矿脉, 纹理, 性情, 心绪 vt.使成脉络, 象脉络般分布于 visa n.签证 vt.签准，维萨信用卡 vo

发表于:2019-02-07 / 阅读(339) / 评论(0)

考研英语

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(364) / 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(343) / 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(256) / 评论(0)

英语新闻

剑11阅读生词文章注解--passage2

navigability 适航性 dismantle 拆除 commemoration纪念 tilting 倾斜的 monorail 单轨铁路 ribcage 胸廓 weld 焊接 bolt 插销，螺栓 hydraulic 水力的 clamp 夹紧，固定住;夹钳，螺丝钳 axle 车轴 revolution 一周(转) cog

发表于:2019-02-19 / 阅读(330) / 评论(0)

雅思英语

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(294) / 评论(0)

万物简史

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学英语单词

adiabatic reversible process

al-anfal

Babinski's method

bagging platform

barium sodium niobate crystal

cherish the memory of