常見例句One should not run about aimlessly during an alert. 空襲警報期間不可到處亂跑。She is always on the alert for some new calamity. 她總是保持警覺以防某種新的災(zāi)難。Keep on the alert; we're due for an inspection. 提防著點,輪到檢查我們了。Be sure to be watchful or alert. 必須留神,千萬要提防。They have put the army on the alert. 他們已使軍隊進入戒備狀態(tài)。The alert leopard went up to a deer quietly. 警覺的豹子靜悄悄地走近一只鹿。 返回 alerter