あお向けに寝ると、舌やノドチンコがノドの奥に下がるため、上気道が塞がりやすくなります。
What time will you have to go to bed?
If you sleep on your back it's easier for your upper airway to be obstructed because your tongue, uvula, etc. slip towards the back of your throat.
I wish I were a good singer.
He graduated from high school this spring.
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