expansion into powerseries的用法和样例：
例句
- Based on the theory of modal superposition and power series expansion, a modal superposition method for the sensitivity analysis of FRF is proposed in this paper.
基于模态展开和幂级数展开原理，提出了一种频响函数灵敏度分析的模态展开法。 - A Taylor series expansion of the transfer function yields the number of paths of a given length between the source and the destination.
传输方程的泰勒级数展开可显示信源和终点间所存在的给定长度的路径数。
