piecewise regular function

例句：

1. 1. The piecewise regular function is used to model the behavior of a system that changes its behavior at different points in time.
   分段规则函数用于模拟系统在不同时间点行为改变的情况。
2. 2. In this example, we will use a piecewise regular function to solve a problem involving multiple variables.
   在这个例子中，我们将使用分段规则函数来解决涉及多个变量的问题。
3. 3. The piecewise regular function can be used to model the behavior of a system that has multiple statesor conditions.
   分段规则函数可以用来模拟具有多个状态或条件的系统的行为的。