名词
中文翻译：谐波展开
同义词：
['harmonic progression', 'harmonic analysis']
例句：
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1.The harmonic expansion of the system is a key factor in its stability.
系统谐波展开是其稳定性的关键因素。
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2. In harmonic expansion, the energy is distributed evenly across all frequencies.
在谐波展开中，能量均匀分布在所有频率上。
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3.The harmonic expansion of the data shows that there are significant differences between different groups.
数据谐波展开显示不同组之间存在显著差异。