Unit 4　Astronomy：the science of the stars

Ⅰ.常考单词必背

1．harmful adj.有害的

It's harmful to your eyes to read books in the bus.

在公共汽车上看书对你的眼睛有害。

[快速闪记]

(1)be harmful to...对……有害

(2)harmless adj.无害的

harm n．损害；伤害 v．对……有害；伤害；损害

2．exist vi.存在；生存

Nothing exists on the moon as there is no water and no air.月球上没有东西生存，因为那里没有水和空气。

[快速闪记]

(1)exist in存在于　exist on靠……生存

There exist(s)/existed...某地有/存在……

(2)existence n．存在；生存

3．puzzle n．谜；难题　vt.& vi.(使)迷惑；(使)为难

The puzzled look on her face suggested she was puzzling over the puzzling math problem.她困惑的表情暗示了她正在思考那个令人困惑的数学问题。

[快速闪记]

(1)be in a puzzle感到困惑；不知如何是好

puzzle about/over冥思苦想；苦苦思索

(2)puzzling adj.令人迷惑的

puzzled adj.感到迷惑的

4．pull n．& vt.拉(力)；拖；牵引力

She pulled his sleeve to get his attention.

她拉拉他的袖子以引起他的注意。

[快速闪记]

pull down摧毁、推翻、拆除

pull in进站停靠；驶向路边(或某处)停靠

pull out离站；(使)摆脱困境

pull through恢复健康；渡过危机

5．mass n．质量；团；块；大量；(复)群众

I have masses of work to do.我有大量工作要做。

Ⅱ.高频短语必会

1．in time 及时；终于

Lucky for him，he was just in time for the bus.

幸运的是，他及时赶上了公共汽车。

[快速闪记]

on time准时；按时　at a time一次；每次

at one time曾经；一度；同时

at times有时；偶尔　at no time决不

in no time马上；立刻

2．give birth to 产生；分娩

To our great joy，my sister－in－law gave birth to a baby boy.使我们大为高兴的是，我嫂子生了个男孩。

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at birth出生时

by birth天生地；生来；在血统上

3．in one's turn 轮到某人；接着

When it was in my turn，I was too excited to speak.

当轮到我时，我激动地都说不出话来了。

[快速闪记]

in turn 依次；轮流；因此；因而

by turns 轮流；依次

take turns to do sth/in doing sth 轮流做某事

It is sb 's turn to do sth 轮到某人做某事

4．prevent...(from) 阻止；制止

No one can prevent me(from) going there.

没有人能够阻止我去那儿。

[快速闪记]

(1)protect...from/against...保护……不受……侵袭

(2)同义词：stop...(from) doing...；keep...from doing...

5．cheer up 感到高兴；感到振奋

I wrote that song just to cheer myself up.