名词
中文翻译：单音调
同义词：
['monotonous', 'monotone']
例句：
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1.The singer's voice has a unique single tone.
这位歌手的声音有一种独特的单音调。
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2. The composer used a single tone to create the piece.
作曲家使用了一个单一的音调来创作这首作品。
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3.The music was played in a monotone that made it hard to follow.
音乐以单调的旋律演奏，让人难以跟上节奏。