The Rational solution has a positive impact on many of the other parameters as well, but for the sake of simplicity, this model only deals with this subset.

Rational解决方案也对很多其它参数有正的影响，但为了简单化，模型仅仅处理这个子集。

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This has to be part of the solution to our pensions crisis and, in fact, can be a very positive model for the future.

事实上，这必须是解决我们退休金危机的一部分，因为它将是一个对未来非常有积极作用的模式。

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If the coefficients satisfy additional conditions, every positive solutions of the model asymptotically approach the unique strictly positive periodic solution of the corresponding periodic system.

对系数附加条件后，该模型的任意正解渐近稳定地趋于对应周期系统的正周期解。

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