At last, the article points out some unresolved problems on nonlinear system theory, and discusses some trends oft he nonlinear system.
最后，文章还指出了非线性系统理论尚未解决的问题，并指出了其发展前景。
At last, the article points out some unresolved problems on nonlinear system theory, and discusses some trends oft he nonlinear system.
最后，文章还指出了非线性系统理论尚未解决的问题，并指出了其发展前景。
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