To get started, select a smallish brush with 100% hardness and start to paint over the duplicated layer with it.

准备就绪，选择一个100%硬度的短小画笔，然后用它在复制的图层上开始绘制。

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Coat your pet's paw with a thin layer of petroleum jelly, and press the top of the paw firmly into the concrete. Press down on the heel of the paw to get a complete print.

把你的宠物爪子上涂上薄薄的一层凡士林，然后把爪子稳稳地按在混合物表面，注意把爪子后部也按住，这样才能得到一个完整的爪子印。

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Basically, we repeat those steps over a few times, fade out the layer, do it again with another one, and you’ll get some small smoky waves like this.

基本上，我们将这样的步骤重复几次，将图层变淡，对于另外一个也应用同样的步骤，你就会得到如下图的效果。

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And those electrons drift up into a gas layer, and when they hit the gas and you get another flash of light.

BBC: Dark Matter: Experiment to shed light on dark particles

Jacobs had better results with Brew, a layer of software that lets games and other apps get loaded onto phones and also handles billing.

FORBES: Magazine Article

We need a new information layer to proselytize this form of investment and get people comfortable with it.

FORBES: Are We On The Verge Of The Greatest Entrepreneurship Bubble Ever?