on the alert
短语词组
- put on the alert 处于戒备状态
- be on the alert 在警惕中的;注意;提防;警戒
- Keep on the alert 提防着点
- Battle Fortress on the alert 战斗要塞警戒之中
- be on the alert for 警戒;戒备
- to be on the alert 警惕
- be always on the alert 一种军事思想;常备
- Always Be On The Alert 常备不懈
- not be on the alert 没有防备 返回 on the alert