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.
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.
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.
同这种邪恶作斗争需要时刻保持警惕。
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.
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.
首席执行官格兰特·克罗瑟斯表示：“我们对高澳元压抑回报率保持警惕。”
Chief executive officer Grant Crothers said, "We remain vigilant with the high Australian dollar depressing returns."
为了避免意外事故，必须经常保持警惕。
Constant vigilance is necessary in order to avoid accidents.
我们必须保持警惕、绷紧神经。
作为战士我们要时刻保持警惕。
骶髂关节的治疗需要时刻保持警惕。
现在起我们应当学会对他们保持警惕。
世界从没有向现在这样保持警惕和戒备。
规则7：保持警惕并一直持有怀疑态度。
对警示性的迹象保持警惕。
父母们应该保持警惕。
他说，大家必须继续保持警惕。
对烟火爆竹保持警惕。
但研究结果强调，需要继续保持警惕。
But the findings emphasize the need for continued vigilance.
但研究结果强调，需要继续保持警惕。
But the findings emphasize the need for continued vigilance.
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