nonlinear systems of algebra

例句：

1. 1. The system isnonlinear, which means it doesn'tfollow a straight line.
   这个系统是非线性的，意味着它不遵循一条直线。
2. 2.Nonlinear systems are often used inphysics to describe phenomena that don't follow a simple pattern.
   非线性系统在物理学中常被用来描述那些不符合简单模式的现象。
3. 3. In this model, therelationship between variables is nonlinear, meaning theoutput depends on both the input and theprevious output.
   在这个模型中，变量之间的关系是非线性的，这意味着输出取决于输入和前一个输出。