Usually, the modeling problem of a chemical process is a nonlinear problem.

一般的化工过程建模问题是非线性的问题。

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Plastic limit analysis is a physical nonlinear Problem.

塑性极限分析是物理非线性问题。

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Plastic limit analysis is a physical nonlinear Problem.

塑性极限分析是物理非线性问题。

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