Make your room dark as possible.
尽量使你的房间黑一些。
Make your room dark, quiet, and cool.
保持房间黑暗，安静，凉爽。
So make your room dark and sleep early in the night allowing your body to produce melatonin.
所以晚上睡觉要保证房间黑暗并且早睡，这样能促进褪黑激素的产生。
Make sure your room is as dark as possible before trying to get to sleep.
所以在睡觉前要确保房间光线尽可能暗。
Make sure your room is as dark as possible before trying to get to sleep.
所以在睡觉前要确保房间光线尽可能暗。
应用推荐