Do not stay up late. Some people love to play cell phones games or reading electronic-books before sleep, this can be bad for the health.
一些人喜欢在睡觉之前玩手机游戏或是看电子书，这对健康很不利。
Do not stay up late. Some people love to play cell phones games or reading electronic-books before sleep, this can be bad for the health.
一些人喜欢在睡觉之前玩手机游戏或是看电子书，这对健康很不利。
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