在控制方程的推导中，对黏弹性本构关系采用物质导数。
The governing equation was derived from the viscoelastic constitution relation by using material derivative.
在控制方程的推导中，采用物质导数黏弹性本构关系取代通常采用的只对时间取偏导数的黏弹性本构关系。
The governing equation was derived making use of the viscoelastic constitution relation in which, besides the time derivatives, the material derivatives was also taken into account.
在控制方程的推导中，采用物质导数黏弹性本构关系取代通常采用的只对时间取偏导数的黏弹性本构关系。
The governing equation was derived making use of the viscoelastic constitution relation in which, besides the time derivatives, the material derivatives was also taken into account.
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