non-linear equation的用法和样例：
例句
- Boundary layer phenomena of third-order nonlinear equation is studied in this paper.
摘要研究某类三阶非线性方程的边界层现象。 - The essay tries to do some comparative studies towards several of alterative methods used in Non-lined Equation Root and its realization.
本文对几种迭代法求取非线性方程根的算法及实现作了对比介绍。
