The police are checking up on him.
警方正在调查他.
Verification (eg checking that weapons have been removed) could be an obstacle to an arms agreement.
裁减军备协议难以达成, 症结在於如何证实(如检查武器确已销毁).
Your duties include checking the post and distributing it.
你的职责是检查和发送邮件.