Beneath this active layer is a second layer called "permafrost", which is frozen all year around, and is impermeable to water.

在这一活跃层下面，是被称为“多年冻土”的第二层，终年冻结，不透水。

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The second layer is the dynamic layer.

第二层是动态层。

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The second layer shows the child font size is changed to 0.75em.

第二个 层显示子字体大小被修改为 0.75em。

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The artist can then add a second color of glass to make designs over the first layer of glass.

VOA: special.2009.09.16

It used to be that the second layer of tax could easily be avoided.

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Some particles, however, are energetic enough to puncture the top layer and strike the second layer.

ECONOMIST: Orbital debris

The second layer of parameters are some of the more traditional value parameters.

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