Then the disease-free equilibrium point and endemic equilibrium point were proved with global asymptotic stability by constructing functions and basing on the invariant set principle.

通过构造函数及根据不变集原理证明了无病平衡点和地方病平衡点的全局渐近稳定性；

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Then the disease-free equilibrium point and endemic equilibrium point were proved with global asymptotic stability by constructing functions and basing on the invariant set principle.

通过构造函数及根据不变集原理证明了无病平衡点和地方病平衡点的全局渐近稳定性；

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