sit back

1. 休息

He believes he has the right to sit back while others do the hard work.

他认为别人在干重活时他有权利休息。

sit by

1. 抱无动于衷的态度, 坐视不管

We can't just sit by while these people break the law.

我们不能坐视这些人违反法律。

sit in

1. 代理

Mr. Henry is ill tonight so his secretary will be sitting in as chairman at the meeting.

亨利先生今晚生病, 所以他的秘书将代替他当会议主席。

sit on

1. 搁置

He's been sitting on my letter for months.

他把我的信压了几个月。

sit through

1. 一直坐到……结束

I sat through all three performances but none of them was any good.

三个节目我都从头看到尾, 可是没一个节目是精彩的。

sit tight

1. 不动

If your car breaks down, just sit tight and wait for the police to come along.

如果你的车子抛锚, 就留在原处不动, 等警察来。

2. 耐心等待; 静待事态的发展

Due to the blizzard, we had to sit tight at the airport for a day.

由于暴风雪来袭, 我们不得不在机场耽搁一天, 静观事态的发展。

Dad told us to sit tight while he went back to find Mom.

爸回去找妈的时候, 他要我们耐心等待。

sit up

1. 熬夜

The doctor sat up all night with the patient.

医生彻夜守着病人。