名词
中文翻译：频率密度同义词
同义词：
['density of frequency', 'flux density', 'signal density']
例句：
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1. The density of the material is crucial for its strength and durability.
材料的密度对其强度和耐用性至关重要。
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2. In radio engineering, the density of the signal can affect the reception quality.
在无线电工程中，信号的密度会影响接收质量。
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3. The density of the ocean water is affected by temperature and salinity.
海洋水的密度受温度和盐度的影响。