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。
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.
给出系统存在积分不变量的条件，在此条件下导出系统的线性积分不变量、通用积分不变量和二阶绝对积分不变量。
A linear integral invariant, a universal integral invariant and an absolute integral invariant of second order of the system are obtained under the given condition.
给出系统存在积分不变量的条件，在此条件下导出系统的线性积分不变量、通用积分不变量和二阶绝对积分不变量。
A linear integral invariant, a universal integral invariant and an absolute integral invariant of second order of the system are obtained under the given condition.
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