高中英语人教版必修3知识点总结：Unit4 Astronomy：the science of the stars

【重点词汇、短语】

1. system 系统，体系

2. theory 学说，理论

3. violent 猛烈的，激烈的，

4. in time 及时，终于

5. unlike 不同，不像

6. harmful 有害的

7. lay eggs 下蛋

8. exist 存在，生存

9. give birth to 产生，分娩

10. in one’s turn 轮到某人

11. prevent from 阻止

12. puzzle 谜，难题/使迷惑

13. pull 拉，牵引力

14. cheer up 感到振奋

15. now that 既然

16. break out 突发，爆发

17. watch out 密切注视

【重点句型】

1. We usually think of science subjects as physics, chemistry, biology and mathematics. 通常我们认为科学学科为物理、化学、生物、和数学。

2. When are they to hand in their plan?他们的计划什么时候交上来。

3. Whether we help him or not, he will fail.不论我们帮助他与否，他都将失败。

4. It exploded loudly with fire and rock, which were in time to produce the water vapour, carbon dioxide, oxygen, nitrogen and other gases, which were to make the earth’s atmosphere.它(地球)巨大的爆炸喷出了烈火与岩石，最终产生了水蒸气、二氧化碳、氧、氮和其他多种气体，从而形成了地球的大气层。

5. It was quite different from what I expected.它和我原来想的很不一样。

6. This made it possible for us to learn English better.这使得我们有可能把英语学得更好。

7. Scientist believe that taking carbon dioxide from the atmosphere and filling the air with oxygen helped life to develop.科学家认为，从大气中吸取二氧化碳，并向空气中释放氧气，有助于生命的发展。

8. He has experience as well as knowledge.他既有学识又有经验。

9. They are putting too much carbon dioxide into the atmosphere ,which prevents heat from escaping from the earth into space.他们把太多的二氧化碳释放到大气层中，这使得热量不能从地球上散发到太空中。

10. Whether life will continute on the earth for millions of years will depend on whether this problem can be solved.生命是否会在地球上延续几百万年要取决于这个问题能否得到解决。

　【语法归纳】名词性从句(详见第三单元语法总结)