third-order nonlinearity

例句：

1. 1.The third-order nonlinearity of the material is a significant factor in its performance.
   材料的三阶非线性是其性能的一个重要因素。
2. 2. In the study of nonlinear dynamics, understanding the third-order nonlinearity is crucial.
   在非线性动力学研究中，理解三阶非线性至关重要。
3. 3. The engineers were able to model the third-order nonlinearity of the material accurately.
   工程师能够准确地模拟材料的三阶非线性。