A layer mask is like a light cast onto a layer.

每一层是像一盏灯投到上一层。

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That dream has being long gone since I came to the cities of modern world where we build walls and roofs to limit our vision where we light up the sky to mask true light.

自从我来到现代世界的各个城市以来，那个梦已经消失的无影无踪了。在这些城市里，我们建造了高墙和屋顶来限制我们的视觉，而且我们点亮天空以便掩饰真正的光线。

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Use light blocking curtains or even aluminum foil on the Windows; consider wearing an eye mask.

在窗户上用遮光窗帘，甚至铝箔；可以考虑戴眼罩。

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The material is exposed to ultraviolet light through a mask patterned with the outlines of cells.

ECONOMIST: REPORTS

In a process similar to printing a photograph, engineers beam high-powered light through a mask-like image of the chip, creating a duplicate on a silicon wafer.

FORBES: Trick of the Light

This involves shining light through a patterned mask and on to the surface of a chip, so as to change the chemical properties of the exposed parts of that chip.

ECONOMIST: Transistors: A tall story | The