警方警告公众要警惕可疑包裹。
Police are warning the public to be on the alert for suspicious packages.
同这种邪恶作斗争需要时刻保持警惕。
飞行员必须随时保持警惕。
她强调必须时常保持警惕。
警察已仔细盘问了他，因此他会保持警惕。
The police have questioned him thoroughly, and he'll be on his guard.
他告诫公众要保持警惕，报告任何可疑情况。
He warned the public to be vigilant and report anything suspicious.
武装部队保持高度警惕，以防发生任何报复行为。
The armed forces were on high alert to guard against any retaliation.
在所有任务完成之前，非洲人国民大会丝毫不敢放松警惕。
The ANC could not afford to lower its guard until everything had been carried out.
他们余勇可贾，我们不能放松警惕。
It seems to me they still have some fight left in them. We shouldn't relax our vigilance.
一个警惕的声音说：“谁在那里？”
日本的核危机已经引起了全球的警惕。
扒手需要放松警惕的目标。
即使刺激的强度很低，你也要保持警惕。
You can be alert, even though the intensity of the stimulus is quite low.
这是高度集中的工作，他们需要时刻保持警惕。
It's a very intense job, and they have to be alert every moment.
雷诺的竞争对手标志雪铁龙“极其警惕”工业间谍的风险。
Renault's competitor PSA Peugeot Citroen is "extremely vigilant" about the risks of industrial espionage.
在你最容易受到伤害的时候，你必须非常警惕，尤其是当你感到孤独的时候。
You have to be very alert when you are at your most vulnerable, especially when you are depressed or feeling isolated.
一名警方发言人表示，这是一周内的第三次炸弹恐吓，我们都应该保持警惕。
A police spokesman said that this was the third bomb scare within a week and that we should all be on our guard.
要对胸痛、胸闷、严重呼吸急促、头晕、晕厥等严重的症状保持警惕，并立即就医。
Stay alert to serious symptoms, such as chest pain or pressure, severe shortness of breath or dizziness, or faintness, and seek medical attention immediately.
除非我们保持警惕，否则当机会在手中时，我们很容易意识不到它，也很容易让它流失。
Unless we are vigilant, it's easy to fail to realize an opportunity when it is in hand and it's just as easy to throw it away.
如果人们意识到其他的动机有可能会损害他们信念的准确性，那大部分人都会试图保持警惕。
If people knew that other motives might compromise the accuracy of their beliefs, most would probably try to be on their guard.
有机体更清醒，更警觉；随着有机体对周围环境变得更加敏感，这种提高的警惕性导致对更细微信号的理解。
The organism is more awake, more vigilant; this increased vigilance results in the apprehension of ever more subtle signals as the organism becomes more sensitive to its surroundings.
我们必须警惕这些信号，以同情和关爱来回应，这些信号是标志性特征，说明在任何地方、在所有地方做女人意味着什么。
We must be alert to these signals and respond with the compassion and care that are hallmark traits of what it means to be a woman, anywhere, everywhere.
尽管总体上看，这种对癌症警惕的持续观察是一件好事，但研究人员越来越怀疑，是否所有这些检查对老年人来说都是必要的。
While such vigilant tracking of cancer is a good thing in general, researchers are increasingly questioning whether all of this testing is necessary for the elderly.
她对他的警惕变成了极度的不信任。
主席一直以警惕的目光关注着事态。
那只猫警惕地注视着他。
他警惕地守望着，不放过任何一个陌生人。
她警惕地盯着我，好像我会变得很粗暴似的。
最好的做法就是保持警惕，身体一有变化就去看家庭医生。
The best thing is to be watchful and see the family doctor for any change in your normal health.
保持警惕可以帮你避免很多麻烦。
Keeping your eyes open can help you avoid a lot of troubles.
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