文档介绍：高一英语必修三知识点总结:Unit4
Unit 4 Astronomy: the science of the stars
1. be fundamental to…对……是基本的,必需的This is fundamental to a true understanding of the book. 这对真正理解这本书十分重要。
2. in sb’s presence 当着某人的面,有某人在场
She asked them not to discuss the matter in her presence. 她要求他们不要当着她的面讨论这个问题。
3. be harmful to…对……有害的
= do harm to…The air here is harmful to our health. 这里的空气对我们有害。
4. There is no harm in doing sth. 不妨做某事
= It does no harm to do sth.
He may not be able to help but there’s no harm in asking him. 他可能帮不了忙,但是求他一下倒也无妨。
5. exist on…靠……生存
= live on…They exist on very little food. 他们靠极少的食物生存。
6. exist in…存在于……中
Several people believe the Devil exists in the world. 少数人认为世界上存在恶魔。
7. in a puzzle 不知如何是好,很迷惑
I am in a puzzle about what he said. 我对他说的话迷惑不解。
8. in time
1)迟早;最后= sooner or later; eventually
2)及时;不迟= not late
You’ll learn how to do it in time. 你早晚能学会做这件事的。
Will I be in time for the train? 我赶得上那趟火车吗?
9. give birth to…生出,产出
She gave birth to a second child in January. 一月份的时候她生了第二个孩子。
The Chinese nation has given birth to many national heroes and revolutionary leaders. 中华民族养育了很多民族英雄和革命领袖。
10. in one’s turn 轮到某人也(做某事),也They, in their turn, made a proposal. 他们接着也提了一个建议。
11. by turns 轮流,交替
The two brothers looked after their sick mother by turns. 兄弟俩轮流照看他们生病的母亲。
12. in turn 依次
Each man in turn stood up and spoke. 每个人依次站起来发言。
13. It