The warehouse hired a night sentinel to watch for the delayed shipment from Busan.

倉庫聘請了一名夜間看守員，負責留意從釜山延誤的貨物到達。

Our IT team acts as a sentinel, monitoring the network for any suspicious login attempts.

我們的資訊團隊扮演哨兵的角色，監控網路上任何可疑的登入行為。

The hotel posted a sentinel at the lobby entrance to greet the arriving tour group.

飯店在大廳入口安排了一名守望人員，迎接即將抵達的旅行團。