- 哨兵: sentry; guard
- 线: thread; string; wire
- 偷过哨兵线: run the guard
- 哨兵: 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.; 哨兵岗 picket post
- 散兵线: skirmish line
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