名词
中文翻译：手肘
同义词：
['knuckle', 'elbow例句：1. She slammed the door shut with her knuckles.（她用拳头猛地关上了门。）']
例句：
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1. She slammed the door shut with her knuckles.
她用拳头猛地关上了门。
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2. The man's knuckles were bleeding from hitting the table.
那男人的手上因为敲打桌子而流血了。
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3. He knelt down and rubbed his knuckles together to warm them up.
他跪了下来，搓着手取暖。