步哨 meaning in Chinese

sentry; sentinel

What does it prove ? he was saying , as rostov rode up to them . they might have retreated and left pickets
当罗斯托夫走到他们面前时，说道， “他们也许已经退却，留下了步哨。 ”
Follow me , he said , cut across the road , and began galloping up the hill towards the point where the french picket had been in the evening
他说道，穿过了马路，开始迅速地登山，向法军步哨晚上驻守的地方走去。