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- She is always on the alert for some new calamity. 她总是保持警觉以防某种新的灾难。
- Keep on the alert; we're due for an inspection. 提防着点,轮到检查我们了。
- They have put the army on the alert. 他们已使军队进入戒备状态。
- Troops are on the alert against any possible aggression. 军队戒备着可能的来犯。
- Dogs are always on the alert wherever they go. 无论在什么地方,狗总是处于警觉状态。
- They must be constantly on the alert for the enemy. 他们必须随时注意敌人。
- To be careful or on the alert;take care. 戒备提防或戒备;注意
- Drivers must be on the alert for traffic signals. 司机必须注意交通信号。
- Paying close attention; on the alert. 留心着;警惕着
- The city must be on the alert for being polluted. 城市要防止污染。
- But we must remain on the alert. 但是我们现在仍然要保持警惕。
- Old Jolyon was on the alert at once. 老乔里恩立刻警觉起来。
- The sentries were all on the alert. 哨兵们都警戒着。
- They are always on the alert for traffic signals. 他们总是很留心交通信号。
- To be careful or on the alert; take care. 戒备提防或戒备;注意
- Hearing this, I was instantly on the alert. 我一听这话, 当下就警惕起来。
- You should be on the alert to any sudden change in the situation. 你们要对形势的突变有足够的准备。
- Large enemy forces were on the move; so we must be in the alert. 大批敌军在行动,因此我们必须提防着。
- They did their best to keep on their guard[on the alert]. 他们尽量保持警惕。
- She was always on the alert for some new calamities. 她总是保持警觉以防某种新的灾难。