rubbing
n. 摩擦；研磨；摹拓
v. 摩擦；按摩；触痛（rub 的 ing 形式）
例句
It sounded like two pieces of wood rubbing together.
听起来就像是两块木头在一起摩擦。
《牛津词典》
The old man answered, rubbing his eyes.
老人揉着他的眼睛回答说。
The back of my shoe is rubbing.
我的鞋后跟磨脚。
