The security guard watches the monitor at the school gate.
警衛在校門口看著監視器。
We checked the hallway on the monitor from the office.
我們在辦公室的監視器上查看走廊。
There are two monitors in the guard room.
警衛室裡有兩台監視器。
The store uses a monitor to watch the entrance.
那家商店用監視器觀看入口。