简明英语-中文词典
әˋlFt; әˊlәːt < a.lert >
[次常用字]
<<形容词>>
1 留心的; 警觉的
alert to danger 警觉到危险
an alert bank guard 银行警戒装置
2 机敏的; 敏捷的
3 灵活的
the bird's alert hopping from branch to branch 小鸟灵活的在枝头跳来跳去
<<名词>>
1 警报
Sirens sounded the alert for an air raid. 空袭警报的警笛响起
2 发出警报的期间
Nuclear-armed bombers were put on alert during the crisis. 核武轰炸机在危机期间负责警戒
<<及物动词>>
a.lert.ed, a.lert.ing, a.lerts
发出警报
a flashing red light that alert motorists to trouble ahead 闪烁的红灯警告驾驶人前面有状况发生
<<惯用语>>
on the alert
警戒著; 提防著
bird watchers on the alert for a rare species 看守者警戒稀有鸟类