为了睡觉

to sleep───睡觉；长眠

good sleep───良好的睡眠

lose sleep───失眠

dogsleep───n.假寐；打盹

for free───免费

for keeps───永远

for sale───出售；待售

The need for sleep varies considerably from person to person.───在许多动物世界里，夜晚是用来睡觉的。

In much of the animal world, night is the time set aside for sleep.───两个人随即打了个呵欠，印第安·乔说：“我困得要死了！”

Obesity is a major risk factor for sleep apnea.

Not much need for sleep, much less to spend any time with his family.

I'm aching for sleep.

They lay there, waiting for sleep to come.

For sleep and wakefulness there is a shorter, embedded cycle around 12 hours long.

You may lose time needed for sleep, rest, study, club activities, and recreation.

Swap reruns for sleep. Replace half an hour of television watching with additional shut-eye daily and you'll wake up with lower levels of hunger hormones.

Dave doesn't realise how desperate I am for sleep.

The need for sleep varies considerably from person to person.