该公司有一条完全弹性的需求曲线。

That company has a perfectly elastic demand curve.

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它们是完全弹性的。

And they are completely elastic.

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实际储层中的岩石是一种非完全弹性的材料，特别是当流体渗入后，岩体往往表现出较强的粘弹性。

Actual reservoir rocks are anelastic materials, especially when they are saturated with some kind of fluid, which will make the viscoelastic characteristics more significant.

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