名词
中文翻译：Unknown
同义词：
['buttocks', 'buttock', 'buttocks']
例句：
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1. She sat on the couch with her buttocks sticking out.
她坐在沙发上，屁股凸出。
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2. The buttocks are covered in a thick layer of hair.
臀部覆盖着厚厚的毛发。
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3. He lifted his buttocks to get a better view of the game.
他抬起臀部以便更好地观看比赛。