go on watch

例句：

1. 1. We need to go on watch for the rest of the night.
   我们需要继续监视直到夜晚结束。
2. 2. The police are going on watch in the area around the crime scene.
   警方正在该地区周围的犯罪现场进行监视。
3. 3. The security guard went on watch at the entrance of the mall.
   保安在商场入口继续监视。