名词
中文翻译：平坦的耳朵
同义词：
['flat', 'level', 'smooth例句：1. The flat ear of the piano is very sensitive to vibrations.（钢琴的平坦耳朵对振动非常敏感。）']
例句：
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1. The flat ear of the piano is very sensitive to vibrations.
钢琴的平坦耳朵对振动非常敏感。
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2. The flat ear of the guitar is designed to be easily played.
吉他的平坦耳朵设计得便于演奏。
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3.The flat ear of the drum is used to produce a hollow sound.
鼓的平坦耳朵用来产生空心声。