名词
中文翻译：臀部骨
同义词：
['buttocks bone', 'hip bone例句：1. She was sitting on the couch with her rumpbone sticking out.（她坐在沙发上，屁股突出。）']
例句：
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1. She was sitting on the couch with her rumpbone sticking out.
她坐在沙发上，屁股突出。
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2. The doctor told him to rest his rumpbone and avoid any strenuous activity.
医生告诉他要休息他的臀部骨，避免任何剧烈活动。
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3.The baby's rumpbone was sore from being carried too often.
婴儿的臀部骨因为经常被抱起而感到疼痛。