The second set consisted of patina ― a chemical film encrustation on one of the limestone boxes.

第二套样本中包含有铜绿――在一个石灰石盒子上附着的一种化学物质。

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A layer of chemical film can be formed on the surface of solid through chemical reaction. The quality of film is decided by the speed of chemical reaction of film surface.

通过化学反应可以在某些固体表面上形成一层化学薄膜，膜的质量是由成膜时膜表面的化学反应速率决定的。

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Inside Kodak, this was known as the "silver halide" strategy -named after the chemical compounds in its film.

在柯达内部，这一方式被称为“卤化银”(silver halide)战略，这是以在其胶卷中所使用的化学制剂混合物而命名。

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While Kodak invented many of the core technologies underlying digital cameras, its management was too addicted to the steady flow of fat profits from its film, paper, and chemical franchises to risk cannibalizing it.

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Manufacturers in China would have a dreadful time producing good conventional film cameras, for example, because of the complex optical, chemical and mechanical processes that must be mastered.

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But the Royal Society of Chemistry, which promotes the work of chemical sciences, says that it also meant that millions of people who saw the film saw nuclear technology being presented as a "barely-controllable force for evil".

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