Troops in the Philippines have been puton full alert in anticipation of trouble during a planned general strike.
预期在计划的总罢工期间会有麻烦,在菲律宾的军队已处于完全戒备状态。
《柯林斯英汉双解大词典》
2
Following the bomb blast, local hospitals have been puton red alert.
炸弹爆炸之后,当地医院一直处于戒备状态。
《牛津词典》
3
Your epidemiologists are onthe spot to investigate rumours or facts and putthe regional and head office onalert, or in a position to reassure the rest of the world.