keep early hours 早睡早起；
例句：
他身体健康，因为他早睡早起。
He is in good health for he keeps early hours.
它告诉我们，我们必须早睡早起。
Its good to go to bed and get up early.
他们家的人都早睡早起。
All the members of his family keep early hours.
不用说早睡早起是值得的。
It goes without saying that it pays to keep early hours.
的道理，教育学生养成早睡早起的好习惯。
Early to bed, early to rise, makes you healthy.
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