n.衛(wèi)兵；哨兵

No one was excluded from sentry duty. 人人都得站崗放哨。

Paul has just come off sentry. 保羅剛退哨。

The sentry had orders to shoot on sight. 哨兵奉命一發(fā)現(xiàn)有動靜就立即開槍。

The sentry was praised for his alertness in his post. 哨兵因他站崗時的機警而被稱贊。

People approaching the gate were challenged by the sentry. 向大門走去的人受到了哨兵的查問。