What is the secret to get 7-8 hours high quality sleep?

想知道获得七到八小时高质量睡眠的秘诀吗？

youdao

I keep the secret of health: adequate sleep, early hours, a healthy diet.

这是我保持身体健康的秘决：充足的睡眠，早睡早起、健康饮食。

youdao

I keep the secret of health: adequate sleep, early hours, a healthy diet.

这是我保持身体健康的秘决：充足的睡眠，早睡早起、健康饮食。

youdao