Part of the trick was to find a suitable photochromic material whose clear and opaque parts would remain stable after the initial exposure to light.

成功实现这一过程的部分关键在于找到合适的光敏材料，其在最初曝光之后透明与不透明区域都应保持稳定。

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To eliminate this effect, you can place a small piece of opaque material or black foam just long enough to block the direct part of the light from hitting your subject.

为了消除这种效果，可以在闪光灯灯头上加一片不透明材料或黑色塑料泡沫板做的遮光片，以阻挡扩散的光线照射到被摄体。

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All that separates the art Deco lobby from the office space is a plate of opaque yellow glass, part of the famed domed ceiling.

将哥特·德科风格旅馆与电信办公空间分隔开的是一块不透明的黄色玻璃板材，曾是这座建筑著名的圆顶天花板的一部分。

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An arbitrary starting point heck, a whole series of arbitrary starting points have been handed down, anchored into practice with insufficient adjustment, this irrational marketplace enduring in large part because the prices are opaque to most customers who, besides which, are protected from most of the expense because they have insurance.

FORBES: Hospital Pricing and Irrational Thinking

Kamprad has shrouded his business in an opaque collection of trusts and holding companies, in part to shelter Ikea from Sweden's confiscatory taxes and death duties.

FORBES: Gates Still On Top