spectral centroid

例句：

1. 1.The spectral centroid of the spectrum is the point at which all frequencies are equally spaced.
   光谱的中心点是所有频率等距离分布的点。
2. 2. In this study, we found that the spectral centroid shifted significantly with changes in temperature.
   在这项研究中，我们发现光谱中心点随着温度的变化而显著移动。
3. 3. The spectral centroid can be used to calculate the average wavelength of a spectrum.
   光谱中心点可以用来计算光谱的平均波长。