美 [hɪt ðə sæk]
上床睡觉：指去睡觉，通常指晚上上床休息。
prepare for sleep
同义词： go to bed / turn in / bed / crawl in / kip down / hit the hay / sack out / go to sleep / retire
... do not sleep a wink 一夜没合眼 hit the sack 倒头就睡 light sleeper 睡觉轻的人 ...
睡觉；就寝
Clear your mind by meditating 15-20 minutes before you hit the sack.
在你一头扎进枕头前，通过冥想15到20分钟来清空你的大脑。
Its getting late, I should better hit the sack, until next time, have a good life folks.
有点晚了，我最好上床睡觉了，下次再聊，开心的生活啊朋友们。
But the long-term consequences of sleep deprivation should be enough to convince anyone to hit the sack.
但如果是长期的睡眠剥夺其所带来的后果应该足够能说服任何人赶紧上床睡觉。
Wrap up your workout at least three hours before you hit the sack: Exercise can be too stimulating near bedtime.