It is produced by the reduction of fuchsin by sulfurous acid , and is oxidized by aldehydes and ketones , restoring the magenta color of the fuchsin 配法是用亚硫酸使品红溶液还原，若有醛酮类存在时便使之氧化而重新呈现品红本身的洋红色。
Peitou originally took its name from a plains aboriginal word meaning " shamaness . " perhaps the original inhabitants were frightened by the sulfurous fumes that permeate the air here , or perhaps their wise medicine women really were drawn to this place for its hot springs 北投的地名，为平埔族女巫之意，命名的来由可能因为这里硫磺热气终年不断，让原住民心生恐惧，以女巫来形容。也可能这里的温泉的确吸引了具有较高智识的女巫前来居息。
Naturally , further layers exist in between , like the virtual file system layer and the actual memory management routines , but regarding managing structured information accessible to users , it makes sense for power users to peer into file system internals and get just a sulfurous whiff of the kernel s infernal recesses 当然，在这两者之间还存在很多层，如虚拟文件系统( vfs )层和实际存储管理例程，但是就管理用户可用的结构化信息而言，超级用户看一下系统内部，并对内核的最深处有一些了解是很有意义的。
