Greater attention has been paid to the complexity and nonlinear mechanical behavior of concrete material.
混凝土材料的复杂性及其非线性力学行为越来越受到重视。
Because of the complexity, the control problem of nonlinear system is always difficult.
由于非线性系统的复杂性，非线性系统的控制问题一直是一个难点。
Because of the complexity, the control problem of nonlinear system is always difficult.
由于非线性系统的复杂性，非线性系统的控制问题一直是一个难点。
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