The photons don't change every halide.

光不会改变所有的卤化物。

Another name for a halide is a salt.

卤化物还被叫做盐。

Typically, it's silver halide crystals floating around in gelatin, which solidifies on the film.

有代表性地悬浮体中的卤化银晶体，其最终固定卷上。

But the basic idea is that they react with the remaining silver halide crystals to create an image you can see.

但基本思路都残留的卤化银晶体反应，生成可见的图案。

Silver halides are just some atoms of silver bound to atoms of any element known as a halogen, which includes things like bromine, chlorine, and iodine.

卤化银由银卤素组成，卤素包括像溴、氯、碘等元素。

Halogens can react with metals to form halide crystals, in which the atoms become arranged in a very orderly grid called a lattice.

卤素能金属反应生成卤化物晶体，晶体中以非常有序的格排列，称为晶格。

If more photons hit a silver halide crystal, more reactions with the developer can happen, and that spot on the film strip becomes darker.

更多光撞击卤化银晶体，会引发更多显影剂反应，并且卷上的该点也会变得更暗。

The silver ions in the exposed halide crystals, the ones with metallic silver in them, will have more reactions with the developer, creating more metallic silver in those grains.

曝光的卤化物晶体含有金属银，该晶体的银离显影剂反应更加充分，从而生成更多的金属银。

In particular, one promising feature of metal halides is that they can be used to make new types of solar cells which are more efficient at converting sunlight into electricity than the silicon-based cells currently employed.

特别，金属卤化物一个非常棒特点，它们可以用来制造新型太阳能电池，这种电池比目前使用的硅基电池将太阳光转化为电能的效率更高。