尘云假说

大学英语自学教程上UNIT10

[00:04.49]Scientific Attitudes [00:06.97]科学的态度 [00:09.46]Science had its beginning when man started asking questionsabout his environment. [00:14.18]科学起源于人类开始对自身环境产生疑问的时候. [00:18.91]He wondered where the sun went at night an

发表于:2018-12-04 / 阅读(49) / 评论(0)

大学英语自学教程上

世界小史第6章:巨型动物

Now, try to imagine 1,000 million years! 现在试着想象10亿年（有多长）！ At that time there were no large animals, just creatures like snails and worms. 当时还没有巨型动物，只有蜗牛和虫这样的生物。 And before then t

发表于:2018-12-07 / 阅读(29) / 评论(0)

世界小史

想聊就聊-1.07.2寄印刷品

M: Excuse me! W: May I help you? M: Yes, I'd like to send this book to France. W: Let me weight it first. That'll be 14 dollars. M: Can it go in an envelop? W: Of course, it's 4 dollars now. M: Do I need stamps? W: No, you don't. We use computers no

发表于:2018-12-26 / 阅读(31) / 评论(0)

想聊就聊

2015-01-30 BBC:星光七纪元-5

Many regions within these clouds can stay like that for ever for millions of years until something happens, a trigger and then a star forms.The trigger for such a monumental event doesn't have to be much, two clouds conbine as they pass, or a distant

发表于:2018-12-27 / 阅读(59) / 评论(0)

探索与发现2015年

SSS 2009-05-07

Rainforests exist because it rains a lot and that makes forests grow, right? Well, not so fast. What if its not the rain that makes the forests? What if its the forests that actually generate the rain? That is the contention of a paper in BioScience

发表于:2019-01-08 / 阅读(63) / 评论(0)

Scientific American(五)月

常用英语口语：寄印刷品

发表于:2019-02-21 / 阅读(26) / 评论(0)

英语口语

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学英语单词

acid-carbonate

active valency

adultering

advice of circumstances preventing carriage