词汇与表达：preemptive

preemptive


If you need to be up late, take a preemptive nap to keep from nodding off;
如果你需要熬夜到很晚，可以提前小睡一会儿，以防打盹。

  

I.. Sometimes you need to make a preemptive strike.

我…有时你需要先发制人