N-COUNT 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。
With thumbs and support, carry buttock is on a "bridge" shape.
用手脚支撑，提臀上挺成“桥”状。
Objective to explore the countermeasures for newborn red buttock early warning and nursing.
目的：探讨新生儿红臀的预警以及护理对策。
The buttock muscles extend the thigh bone of the back leg. The back foot is fixed on the mat.
盆腔肌肉使后退的大腿骨伸展，后脚固定于垫子上。
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