名词
中文翻译：Unknown
同义词：
['middle finger', 'middle phalanx']
例句：
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1. The artist painted the figure with great care on the metacarpus.
艺术家在中指上仔细地画了这幅画。
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2. The scientist measured the length of the metacarpus to determine the size of the animal.
科学家测量了中指的长度，以确定动物的大小。
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3. During a dance performance, the performer used her metacarpus to demonstrate the steps.
在一场舞蹈表演中，表演者用她的中指来展示舞步。