Between the last layer of Cretaceous rock and the first layer of Cenozoic rock, there is often a thin layer of clay.

在最后一层白垩纪岩石和第一层新生代岩石之间，常常有一层薄薄的粘土。

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The top layer should now point down to the layer beneath.

顶部图层应当指向下面的图层。

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

VOA: special.2009.09.16

But I'm sure you can easily see how these styrofoam balls could, in fact, be a mono layer of gold nuclei.

这个实验怎么工作的,我们先来做些计算，但我相信你们都已经。

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there are many genes that are already expressed and presented in this dimpling and thickening of the outer layer.

在外胚层的凹陷和增厚过程中,表达了很多基因。

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"It's like baking a layer cake, but doing it one layer at a time, " said Atala.

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

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You have to add to this layer upon layer of professional interest groups having their say.

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