A thin layer of dust covered everything.

所有的物品上都积了薄薄的一层灰尘。

《牛津词典》

I could see a thick layer of dust on the stairs.

我能看见楼梯上厚厚的一层灰尘。

《柯林斯英汉双解大词典》

Everything was covered with a thick layer of dust.

所有的东西都覆盖着厚厚的一层灰尘。

《牛津词典》

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。

麻省理工公开课 - 化学原理课程节选

First is that we have this mono layer of gold particles. So let's see if Professor Drennen is able to help us out here.

是如何做的,我们等会儿会自己做这个实验,我会问你们一些问题。

麻省理工公开课 - 化学原理课程节选

They could see it in the layer of sweat that was gathering on his face.

NEWYORKER: Ghosts

Standardized derivatives will also have to be handled by central clearinghouses, another layer of risk management.

FORBES: As Senate Passes Financial Reform, Wall Street Braces For What Comes Next

That extra layer of regulation will come at a cost for many banks, particularly small ones.

FORBES: Wells Fargo Ditches Canadian Brokerage Biz, More Banks Will Follow Suit