night watcher

例句：

1. 1. The night watchman kept a close eye on the security cameras.
   夜班守卫密切监视着安全摄像头。
2. 2. The night watchman was responsible for monitoring the perimeter of the castle.
   夜班守卫负责监控城堡的外围。
3. 3.The night watchman reported to headquarters that the intruder had been caught.
   夜班守卫向总部报告说，入侵者已经被抓获。