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SCIENCE STUDY

One is better than many

作者:TEENS
Aa
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Setting one alarm is enough.  TUCHONG 

Setting many alarms is bad for sleep

定闹钟不是越多越好哦!

To get up on time, some of us may set many alarms (闹钟) for the morning. But this can be bad for our health (健康) because it makes our REM sleep poorer.

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