愉悅口語:第168期 磨牙英文怎麼說

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講解文本：

grind one's teeth 磨牙
grind 磨，碾
Some people grind their teeth while they are asleep.
有些人睡覺時磨牙齒。
My roommate Jack always grinds his teeth in his sleep, which is a totally disaster.
我室友Jack喜歡睡覺磨牙，這對我就是個災難。

瘋狂練習吧！