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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Using galvanised clout nails with large heads, start to nail the first layer of felt onto the decking.

使用镀锌的大头钉，开始把第一层毛毡钉在甲板上。

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They only painted the first layer fo poaint.

他们刚刷了第一层油漆。

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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

The way we did this was to coax embryonic stem cells first to develop into the surface layer.

我们是这么做的,先诱导胚胎干细胞,发育成外胚层。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

First is that the ear develops from the surface layer of the embryo.

耳朵是由,胚胎的外胚层发育来了。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

The upholstered furniture is the first layer, which I always think of as the canvas on which to paint.

WSJ: Mastering the Layered Look | Living Well

Is he not troubled that the first layer was a pass through, that the suspect got on the plane despite being on the list?

WHITEHOUSE: Press Briefing

Nanogate takes a material to be coated, applies a layer of adhesive nanoparticles and then adds another layer of non-adhesive nanoparticles that bind to the first layer.

FORBES: Nanotechnology: A New World Is Born