保持清醒英文是stay awake。
例句:
1、你面试时需要保持清醒的头脑。
You'll need to keep a clear head for your interview.
2、在危急关头要保持清醒的头脑。
Keep a cool head during the crisis.
3、运动后,你的头脑可以保持清醒4-10小时。
You can keep your head clear for 4-10 hours after exercise.
4、如果你到目的地时是白天,尽量保持清醒。
If it's daytime in your destination, try to stay awake.
5、我只是想保持清醒。
I'm just trying to keep my head above water.