| 释义 |
alerta·lert1 /əˈlərt / adjective alert (to sth) watching, listening, etc. for something with all your attention警觉的；留神的；注意的◆Security guards must be alert at all times.保安人员必须时刻保持警惕。◆to be alert to possible changes注意可能出现的变化
alerta·lert2 /əˈlərt / noun [countable] a warning of possible danger警报◆a bomb alert炸弹警报 ●on (the) alert (for sth)ready or prepared for danger or an attack（对某事）处于警戒状态◆The public was warned to be on the alert for possible tornadoes.公众被警告对可能出现的龙卷风保持警惕。
alerta·lert3 /əˈlərt / verb [transitive] alert sb (to sth) to warn someone of danger or a problem使警觉；使警惕；向…发警报 |