1、cover up

动词(用…)盖在…上(以保护或隐藏)

He fell asleep in the front room so I covered him up with a duvet.

他在起居室睡着了，我便给他盖上了羽绒被。

隐藏，遮掩(事实)

He suspects there's a conspiracy to cover up the crime.

他怀疑有人密谋掩盖犯罪事实。

They knew they had done something terribly wrong and lied to cover it up.

他们知道自己犯了十分严重的错误，于是撒谎隐瞒。

2、pull out

（车或驾车者）驶离路边，开向路中间

She pulled out into the street.

她开车来到大街上。

He was about to pull out to overtake the guy in front of him.

他正要驶离车流超前面那人的车。

退出，撤出（协议、比赛或组织）

The World Bank should pull out of the project.

世界银行应从该项目中撤出。

France was going to pull out of NATO.

法国打算退出北约。

（使）撤退；（使）退出

The militia in Lebanon has agreed to pull out of Beirut.

黎巴嫩的民兵组织已经同意从贝鲁特撤出。

Economic sanctions will be lifted once two-thirds of their forces have pulled out.

他们一旦撤出其2/3的军队，经济制裁就会被取消。