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They have another 10 months on their trip home. Space travel is dangerous, they need to be alert and undistracted.
他们还有10个月的航程回家，太空旅行很危险，他们需要警觉且不能分心。
《The Martian》《火星救援》
短语搭配
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be alert to
警惕；保持警觉；应留意
双语例句
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You can be alert, even though the intensity of the stimulus is quite low.
即使刺激的强度很低，你也要保持警惕。
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We must be alert to the possibility of danger.
我们必须认识到危险的可能性。
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It's a very intense job, and they have to be alert every moment.
这是高度集中的工作，他们需要时刻保持警惕。
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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.
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。
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Be alert when driving.
驾驶时保持警觉。