英語四級高頻詞匯第091期

beforehand

英 [b??f??h?nd] 美 [b??f??rh?nd]

adv. 事先；預(yù)先

adj. 提前的；預(yù)先準(zhǔn)備好的

例句：

I wish we'd known about it beforehand.
要是我們預(yù)先知道這事就好了。

I have to say in her defence that she knew nothing about it beforehand.
我得為她說句話，她事先并不知道此事。

It is reasonable to assume that he knew beforehand that this would happen.
有理由認(rèn)為他事先就知道會發(fā)生這樣的事。

missile

英 [?m?sa?l] 美 [?m?sl]

n. 導(dǎo)彈；投射物

adj. 導(dǎo)彈的；可投擲的；用以發(fā)射導(dǎo)彈的

例句：

The missile homed in on the target.
導(dǎo)彈正向目標(biāo)飛去。

The missile fell harmlessly into the sea.
導(dǎo)彈落到了海里，沒有導(dǎo)致任何傷害。

Their most potent weapon was the Exocet missile.
他們效力最強(qiáng)的武器是飛魚導(dǎo)彈。

bacteria

英 [b?k?t??ri?] 美 [b?k?t?ri?]

n. [微] 細(xì)菌

例句：

Chlorine is added to kill bacteria.
加入氯以殺菌。

The bacteria are harmless to humans.
這些細(xì)菌對人無害。

The bacteria were growing in a sugar medium.
細(xì)菌在糖基中生長。

outset

英 [?a?tset] 美 [?a?tset]

n. 開始；開端

例句：

Decide at the outset what kind of learning programme you want to follow.
一開始就要定下你的學(xué)習(xí)計劃。

I never understood why he didn't just accede to our demands at the outset.
我從不能理解為什么他不一開始就答應(yīng)我們的請求。

The president has played a shrewd diplomatic game because from the outset he called for direct talks.
總統(tǒng)玩了一場精明的外交游戲，因為從一開始他就要求進(jìn)行直接對話。

vacuum

英 [?v?kju?m] 美 [?v?kju?m]

n. 真空；空缺，空白；真空吸塵器

adj. 真空的；利用真空的；產(chǎn)生真空的

vt. 用真空吸塵器清掃

例句：

Vacuum cleaners work by suction.
真空吸塵器靠抽吸除塵。

The vacuum has an unpleasant smell.
這個真空吸塵器有股難聞的氣味。

Exclusion of air creates a vacuum in the bottle.
瓶子里的空氣排除后就產(chǎn)生真空。

回顧

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