机械扫描分光镜

Supermassive Black Holes 超大质量黑洞 - 5

By measuring how fast these stars were moving, he could prove if there really was a black hole at the center of an active galaxy. I picked a galaxy nearby which is called NGC 1068, an active galaxy, w

发表于:2018-12-07 / 阅读(330) / 评论(0)

超大质量黑洞

VOA慢速英语 2008 0107a

This is the VOA Special English Development Report. Sometimes it takes an engineer to help a village. In poor communities, that help may come from volunteers with a group called Engineers Without Borders. A civil engineering professor in the United

发表于:2019-01-11 / 阅读(40) / 评论(0)

VOA慢速英语2008年（一）月

【有声英语文学名著】不会发生在这里（10）

It Can't Happen Here by Sinclair Lewis Chapter 10 While I hate befogging my pages with scientific technicalities and even neologies, I feel constrained to say here that the most elementary perusal of the Economy of Abundance would convince any intell

发表于:2019-01-26 / 阅读(62) / 评论(0)

有声英语文学名著

英语词汇分类：石油化工

oil field 油田 wildcat 盲目开掘的油井 percussive drilling 冲击钻探 rotary drilling 旋转钻探 offshore drilling 海底钻探 well 井，油井 derrick 井架 Christmas tree 采油树 cr

发表于:2019-02-03 / 阅读(73) / 评论(0)

英文语法词汇

Helping Others 美国方式：帮助他人

Christmas in America means different things to different people. To some people, Christmas means brightly wrapped packages under a decorated tree. To others, it means family reunions and a wonderful meal together. To Christians, it means Jesus' birth

发表于:2019-02-08 / 阅读(58) / 评论(0)

实用英语

TED演讲:我们不要一成不变的教育(3)

Now look, I'm a technology fan, but I have to admit to you all I'm a little old. 我是一个技术发烧友，但我得承认我年纪是大了点。 So I was a little slow, and I did not trust technology, and when they first came out with those new

发表于:2019-02-13 / 阅读(43) / 评论(0)

TED演讲国际问题篇

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学英语单词

biennial vegetable crop

biopunks

Birere

bluetowers