The first integration and integrated invariant of dynamic system belongs to important contents of solving equations of motion integrated theory during solving equations in dynamic system.
在求解动力学系统的方程中，动力学系统的第一积分与积分不变量是求解运动方程积分理论的重要内容之一。
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The precise integration method proposed for linear-invariant dynamic system can give precise numerical results approaching to the exa ct solution at the integration points.