愉悦口语:第168期 磨牙英文怎么说

讲解文本：

grind one's teeth 磨牙
grind 磨，碾
Some people grind their teeth while they are asleep.
有些人睡觉时磨牙齿。
My roommate Jack always grinds his teeth in his sleep, which is a totally disaster.
我室友Jack喜欢睡觉磨牙，这对我就是个灾难。

疯狂练习吧！