1.stay up 深夜不睡；熬夜

例句：You've got school tomorrow. I don't want you staying up late.

你明天要上學(xué)。我不想讓你熬夜。

2.pass out 昏迷；失去知覺

例句：She passed out when she heard the bad news.

她聽到這噩耗后暈了過去。

3.crack up

1.(因壓力造成身體或精神)垮掉,崩潰

例句：You'll crack up if you carry on working like this.

你再這樣干下去,身體會(huì)垮掉的。

2.開始大笑起來

例句：He walked in and everyone just cracked up.

他一進(jìn)來,人人都捧腹大笑起來。

crack sb up 使大笑起來

Gill's so funny, she just cracks me up.

吉爾滑稽極了,逗得我哈哈大笑。

4.fall out 發(fā)生；脫落；爭吵；離隊(duì)；結(jié)果是

例句：Some of them fell out from fatigue.

他們中的幾位由于疲勞而掉隊(duì)。