Soldiers and police have been put on alert.

士兵和警方都已进入警戒状态。

柯林斯例句

On alert the ear should never droop, bend, or crease.

警惕时,耳朵决不下垂 、 弯曲 、 或折叠.

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This will leave the earth vulnerable, so we're still on alert.

这会让地球容易被攻击, 所以我们仍然处于警戒状态.

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Please be on alert against strangers in your premises.

提高警惕,尤其注意租区内的陌生人.

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I think, again, it puts people on alert all the time.

我想必定是周而复始的, 它使人们一直处于高度紧张中.

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Bombers were put on alert during the crisis.

危机时刻,轰炸机处于警戒状态.

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Some 7,000 police will be on alert.

7000警察将在戒备.

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Emergency services were put on alert.

应急服务时刻准备着.

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HK on alert after typhoon sweeps through Philippines.

香港做好“迎接”台风准备.

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Although they may appear dead, they sometimes spring up to attack, so always be on alert.

它们也许看上去已经死去, 但有时它们也会奋起战斗, 时刻处于警戒状态.

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