How long can a human being go without sleep?
人不睡覺能活多久？
He took a long time getting to sleep that night.
他那天晚上過了好長時間才睡著。
You'll feel better for a good night's sleep.
你晚上睡個好覺就會覺得好些。
You'll feel better after a good night's sleep.
你晚上睡個好覺就會覺得舒服些。
I'll feel better after a good night's sleep.
好好睡一晚，我就會覺得好些了。