alert
过去式：
动词过去式: alerted
更多词形：
动词过去式: alerted | 动词过去分词: alerted | 动词现在分词: alerting | 动词第三人称单数: alerts |
单词例句：
We must be alert to the possibility of danger.
我们必须认识到危险的可能性。
One should not run about aimlessly during an alert.
空袭警报期间不可到处乱跑。
The sentries were all on the alert.
哨兵们都警戒着。
Keep on the alert; we're due for an inspection.
提防着点，轮到检查我们了。
An alert listener will have noticed the error.
耳朵尖的人能听出这个错。
Be alert! There's a man spying on us not far away.
当心，有人在不远处窥视我们。
That was the alert, I calculated.
我琢磨，这是在告诉众人对我保持戒备。
A.n alert and responsive baby is a joy.
机警、反应快的婴孩可爱。
They have put the army on the alert.
他们已使军队进入戒备状态。