two-sided spectral density

例句：

1. 1. The two-sided spectral density of the signalis crucial for understanding its behavior.
   信号的双边谱密度对于理解其行为至关重要。
2. 2. Inthis study, we investigated the two-sided spectral density of the system.
   在这项研究中，我们研究了系统的双边谱密度。
3. 3. The two-sided spectral densitycan be used to analyze the frequency responseof a system.
   双边谱密度可以用来分析系统的频率响应。