名词
中文翻译：Unknown
同义词：
['buttocks', 'buttocks area', 'buttock', 'buttock region']
例句：
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1. She sat down on the couch with her buttocks sticking out.
她坐在沙发上，屁股突出。
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2. The doctor advised him to exercise regularly to maintain his good buttocks shape.
医生建议他定期锻炼来保持良好的臀部形状。
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3.The dancer's buttocks were so tight that they looked like a pair of leather pants.
舞者的臀部非常紧致，看起来像是一双皮裤。