只要这些危险一天不排除，我和我的那些高级同僚就时刻不得安生。我们个个都要瞪大双眼，时刻警惕着一切可能发生的严重后果。
I and my senior colleagues are routinely alerted to incidents that could have had severe consequences if they'd not been stopped.
只要看到这种方法，就需要稍微提高警惕；为什么要使用一个计时器呢？
Whenever you see that method, it should set off a little alarm in your mind; why is this person using a timer?
只要一直警惕，小心，司机可以避免危险。
Drivers can avoid danger by being careful and alert all the time.
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