check on

We're checking on how their food was.

我们常去看他们伙食。

They made frequent checks on his respiration,pulse and blood.

他们经常检他呼吸、脉搏和血液。

The trainee checked out all right on his first flight.

受训者第一次飞行完全合格。

Leaving some fields fallow provided a natural check on insect populations.

让一些土地休耕是自然控制昆虫数量办法。

The police were checking up on what the man had told him.

警察正在对那个人所说事实进行彻底核实。

A moment later, a doctor came to check on the hypnotist, and then the audience realized it was an accident.

过了一会儿，一名医生赶来察看这名催眠师情况，这时观众才意识到这是一场意外。