哨兵

哨兵 [shào bīng]

1. ■ sentry; guard:

在门口设一个哨兵 place a guard at the door;

哨兵不让没有通行证的人通过大门。 The guard won't let anyone through the gate without a pass.

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常用词组

1. ■ 哨兵岗 picket post