[jiān shì]
keep watch on; keep a lookout over; guard; monitoring; surveillance
electronic surveillance
电子监视
keep watch on the movements of the enemy
监视敌人的行动
place sb. under surveillance
监视某人
The police kept the criminal under strict surveillance.
警察严密监视那个罪犯。
The customs inspector was on the watch for diamond smugglers.
海关检查员正监视着钻石走私的活动。
He is still under police surveillance.
他仍然受到警方的监视。