buttock lines纵剖面线;船股线;纵剖线;船体纵剖线
Buttock pads丰臀垫;丰臀裤
buttock machine立槽割煤机
furuncle buttock臀疖
buttock pain臀部疼痛
buttock contour臀部轮廓
Augmentation buttock臀部扩大术
buttock spot臀斑
N-COUNT（可数名词） Your buttocks are the two rounded fleshy parts of your body that you sit on. 臀部
There were marks on his buttocks I hadn't seen before.
他的臀部有些我从没有见过的疤。