3、习题
Unit 2 练习：
1.词汇英译汉：
escape, explode, collapse, shrink, gravity, measurement, basis, launch, convincing, companion,
speculation, swallow, operate, to make use of, a great many, above all
2.句子英译汉：
1) ~6) 与常考句型相同。
7) There might be a massive black hole at the center of our galaxy swallowing up stars at a very rapid rate.
8) They show us a world which operates in a totally different way from our own and they question our most basic experience of space and time.
3 句子汉译英
黑洞是什么，天文学家还没有完全解决这个问题。
Astronomers have not yet fully solved the problem of what a black hole is.
据说黑洞可以将其周围的一切物体，如星星吞食掉。
It is said that black holes are able to swallow up all the objects around them, such as stars .
对黑洞的研究刚刚开始，各种各样的假说层出不穷。
The research of black holes is just beginning and speculation about them are endless.
科学家仍不能说出黑洞内发生了什么。
Scientists still can not tell what happens inside a black hole.
It is still impossible for scientists to tell what happens inside a black hole.
如果我们认识了黑洞，黑洞就不那么可怕了。
If we understood black holes, they would not be so fearful .
Black holes will not be so fearful if we get to know them.
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