他跌倒时摔伤了臀部。
He hurt his buttock when he fell.
他滑倒了，摔在了臀部上。
He slipped and landed on his buttock.
他在右臀部纹了一个纹身。
He got a tattoo on his right buttock.
她在健身房锻炼臀部肌肉。
She exercises her buttock muscles at the gym.
医生检查了他的臀部以确定伤势。
The doctor examined his buttock to assess the injury.
