本文工作证实，对于一类具有中心对称型的参数激励系统，其混沌态也具有中心对称性质，从而说明了浑沌并非一定是一种非对称性的动力学形态。

This work shows that for a kind of centrosymmetric systems with parametric excitation, their chaotic state has centrosymmetric property. Our result illustrates that chaos with symmetry may exist.

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