sentries n. 哨兵(sentry的复数)
v. 放哨(sentry的三单形式)
- The sentries alternate their watch .
哨兵们轮流看守。 - Two sentries made straight for him with drawn swords.
两名哨兵抽出刺刀径直朝他冲去。 - Whenever any other insect begins to crawl upon it or lands on one of its leaves the ant sentries send out an alarm, and all the other ants come running.
任何其他的昆虫若开始在树上爬行或者停靠在树叶上,蚂蚁的步哨即会发出警报,通知其他蚂蚁赶来。