英语四级高频词汇第091期

beforehand

英 [bɪˈfɔːhænd] 美 [bɪˈfɔːrhænd]

adv. 事先；预先

adj. 提前的；预先准备好的

例句：

I wish we'd known about it beforehand.
要是我们预先知道这事就好了。

I have to say in her defence that she knew nothing about it beforehand.
我得为她说句话，她事先并不知道此事。

It is reasonable to assume that he knew beforehand that this would happen.
有理由认为他事先就知道会发生这样的事。

missile

英 [ˈmɪsaɪl] 美 [ˈmɪsl]

n. 导弹；投射物

adj. 导弹的；可投掷的；用以发射导弹的

例句：

The missile homed in on the target.
导弹正向目标飞去。

The missile fell harmlessly into the sea.
导弹落到了海里，没有导致任何伤害。

Their most potent weapon was the Exocet missile.
他们效力最强的武器是飞鱼导弹。

bacteria

英 [bækˈtɪəriə] 美 [bækˈtɪriə]

n. [微] 细菌

例句：

Chlorine is added to kill bacteria.
加入氯以杀菌。

The bacteria are harmless to humans.
这些细菌对人无害。

The bacteria were growing in a sugar medium.
细菌在糖基中生长。

outset

英 [ˈaʊtset] 美 [ˈaʊtset]

n. 开始；开端

例句：

Decide at the outset what kind of learning programme you want to follow.
一开始就要定下你的学习计划。

I never understood why he didn't just accede to our demands at the outset.
我从不能理解为什么他不一开始就答应我们的请求。

The president has played a shrewd diplomatic game because from the outset he called for direct talks.
总统玩了一场精明的外交游戏，因为从一开始他就要求进行直接对话。

vacuum

英 [ˈvækjuːm] 美 [ˈvækjuːm]

n. 真空；空缺，空白；真空吸尘器

adj. 真空的；利用真空的；产生真空的

vt. 用真空吸尘器清扫

例句：

Vacuum cleaners work by suction.
真空吸尘器靠抽吸除尘。

The vacuum has an unpleasant smell.
这个真空吸尘器有股难闻的气味。

Exclusion of air creates a vacuum in the bottle.
瓶子里的空气排除后就产生真空。

回顾

1. beforehand
2. missile
3. bacteria
4. outset
5. vacuum