The photons don't change every halide.

光子不会改变所有的化。

Another name for a halide is a salt.

化还被叫做盐。

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

有代表性地悬浮在胶状体中的化银晶体，其最终固定在胶卷上。

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

但基本思路都与残留的化银晶体反应，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.

化银由银原子与原子组成，原子包括像溴、氯、碘等元。

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

能与金属反应生成化晶体，晶体中原子以非常有序的格子排，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.

更多光子撞击化银晶体，会引发更多显影剂反应，并且胶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.

曝光的化晶体含有金属银，该晶体的银离子与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，金属化一个非常棒特点，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。