一整壶咖啡都没法让我提神不瞌睡。

A whole pot of coffee couldn't keep me awake.

youdao

同时，年纪大的人常常睡不沉，夜里时常醒来，这可能使他们白天经常打瞌睡的原因。

Also, older people often sleep less deeply and wake up more often throughout the night, which may be why they may nap more often during the daytime.

youdao

如果你不瞌睡，而且你发现自己无法立即入睡，那么立即起来，让你的头脑保持清醒一段时间。

If you aren't sleepy and find yourself unable to fall asleep quickly, get up and stay awake for a while.

youdao