Standing wave is parasitic effect of exposure, generated by multi reflection and interference of rays vertically incident upon parallel medium layers.

驻波是曝光中的寄生效应，是光线垂直入射到不同的平行平面介质层之间，经多次反射并干涉形成的。

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Oil companies are drilling into rock layers where every square centimeter (0.16 square inch) is subject to pressure equivalent to the weight of a medium-sized car.

石油公司所开采的岩层上，每平方厘米所承受的压力相当于一辆中等大小的汽车。

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Medium size grand piano with complete cast iron plate and very rigid rim made by many layers of hardwood.

中型钢琴完全铸铁板和非常严格环了许多层次的硬木。

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The two layers of taxation for public companies make common stocks a less than ideal investment medium for solar farms, unlike the private equity investments and LLCs used by large investors.

FORBES: Solar REITs: A Better Way to Invest in Solar [Updated]