查词历史：: put on the alert put on full speed put into put into effect

put on the alert

生词本

简明释义

(军队)处于戒备状态

词典例句

词霸2012 v1.2版丰富词典内容优化真人发音

1. The district was put on red alert during a terrorist's bomb scare.: 这个地区在得到恐怖分子炸弹恐吓后作了应急准备。