单词：on the alert
[法] 戒备, 留意
on the alert的用法和样例：
例句
- Fasten on what the teacher is saying.注意听老师说。
- I noticed scores of sorrow on her face.我注意到她脸上悲痛的痕迹。
- Be on the watch for thieves in this crowd.提防人群中有小偷。
- Be sure to be watchful or alert.必须留神，千万要提防。
- Keep a vigilant eye on the imperialist jackals.对帝国主义的走狗要保持警戒。
- My reins also instruct me in the night seasons.我的心肠在夜间也警戒着我。
- Wherever they went she was evidently always on the watch.很明显，无论他们到什么地方，她时时刻刻都在警惕着。
- Knowing that danger threatened, they were on the alert.因为知道可能会发生危险，他们处于戒备状态。
- These networks are on the alert for warning signs that show the weakening of rock layers that can precede an earthquake.这些网络始终处于戒备状态，搜索地震前岩石可能松动的警告迹象。
词汇搭配
- put on the alert处于戒备状态...
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