check on

We're checking on how their food was.

我们常去查看他们伙食。

The trainee checked out all right on his first flight.

受训者第一次飞行完。

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

他们经常检查他呼吸、脉搏和血液。

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

让一些土地休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实进行彻底核实。