harmonic differential

例句：

1. 1. The harmonic differential of the system is a key factor in determining its stability.
   系统谐振差分是决定其稳定性的关键因素。
2. 2. In this experiment, we measured the harmonic differential to understand how the system responds to changes in input.
   在这个实验中，我们测量了谐振差分，以了解系统如何响应输入的变化。
3. 3. The harmonic differential was used to calculate the frequency response of the circuit.
   谐振差分被用来计算电路的频率响应。