名词
中文翻译：正常音调
同义词：
['average pitch', 'average tone']
例句：
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1.The singer's normal pitch is very impressive.
这位歌手的普通音调非常令人印象深刻。
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2.The music was so loud that it drowned out the normal pitch of the instruments.
音乐声太响了，以至于乐器的正常音调都被淹没了。
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3. In a normal pitch, she sings beautifully.
在正常音调下，她唱得非常好听。