integro-differential equation

例句：

1. 1. The solution to this problem is an integral differential equation that needs to be solved numerically.
   解决这个问题需要解决一个积分微分方程，它需要数值求解。
2. 2.The researcher found that the integral differential equation could be used to model the behavior of a complex system.
   研究者发现积分微分方程可以用来模拟复杂系统的运行行为。
3. 3. The integral differential equation was used to describe the motion of a particle in a gravitational field.
   积分微分方程被用来描述粒子在引力场中的运动。