妈妈在15岁的时候开始在暗房里学习如何洗照片.

Mom started to learn how to develop pictures in the darkroom, when she was 15.

哥哥很会拍照，摄影是他的一个爱好，他能自己洗照片。

My brother is a good photographer. Taking pictures is one of his hobbies. He can develop photos himself.

使用硫代硫酸钠溶液，和涂抹酒精一样的方法。硫代硫酸钠溶液通常用来洗照片，可以和碘反应形成可溶于水的碘化物。

Use sodium thiosulfate solution, applying it the same way as the alcohol. Sodium thiosulfate, commonly used to develop photographs, reacts with iodine to make iodide, which is water soluble.