This results in feeling very drowsy and tired for the early part of your day.

这样的结果就会使你在一天的开始部分都感到累和昏昏沉沉的。

youdao

Even though alcohol is very effective at making you feel drowsy and tired, it's horrible for sleep quality.

即使酒精能有效地让你昏昏欲睡和疲倦，但对于睡眠质量而言，这是很不好的。

youdao

One 2010 poll of 1000 Americans found 36% are drowsy or fall asleep when they are driving, and 29% become very sleepy at work.

2010的一份有1000位美国人参与的民意调查显示，36%的美国人在开车时都昏昏欲睡或者睡着，29%的人在工作时非常困乏。

youdao

Sleep apnea may cause a person to be very drowsy in the daytime since nighttime sleep is interrupted frequently.

CNN: How can someone stop or reduce snoring?