She has a set of chef's knives that she grinds every week.
她有一套廚房用刀具,每個星期都磨一次。
He ground down the sharp metal edges to make them smooth.
他把尖利的金屬邊緣打磨平。
The car engine was making a strange grinding noise.
汽車引擎發出一種奇怪的摩擦聲音。
She grinds her teeth in her sleep.
她睡覺磨牙。