Arbitrary and differential are two correlative qualities.

任意性和差异性是两个相关的属性。

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The extinction phenomenon of solution is one of the important qualities of nonlinear parabolic partial differential equation, as it explains comprehensive realistic backgrounds.

解的熄灭现象是非线性抛物型方程解的一个重要性质，有着广泛的物理背景。

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Arbitrary and differential are two correlative qualities.

任意性和差异性是两个相关的属性。

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