名词
中文翻译：音调渐变
同义词：
['toneshift', 'pitch variation', 'timbrevariation']
例句：
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1. Themusic has a tonal gradationfrom soft to loud.
音乐从柔和到响亮有音调变化。
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2. The speaker's tone varied accordingto the audience's response.
演讲者的语调根据听众的反应而变化。
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3.The film's colors have a tonal gradation that enhances itsvisual impact.
电影的色彩具有音调变化，增强了其视觉冲击力。