Strain, or unit deformation, is defined as the unit change in the size or shape of material as a result of force on the material.

应变或者单位变形是材料上的压力造成材料大小和形状的单位改变量。

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And, depending upon, say the density of the gas or the liquid, the size of the molecules, they change parameters in the simulation, how far it, say, goes in each unit time and things like that.

这还取决于，比方说，液体或气体的密度，分子的大小，它们改变了模拟程序中的参数，它们在一个时间单元内运行的距离，或者之类的。

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