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

有代表性地是悬浮胶状中的卤化银，其最终胶卷上。

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

但基本路都是与残留的卤化银应，生成可见的图案。

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

更多光子撞击卤化银，会引发更多显影剂应，并且胶卷上的该点也会变得更暗。

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.

卤化银由银原子与卤素原子组成，卤素原子包括像溴、氯、碘等元素。