柯林斯詞典spontaneous combustion 1. N the ignition of a substance or body as a result of internal oxidation processes, without the application of an external source of heat, occurring in finely powdered ores, coal, straw, etc 自燃 返回 spontaneous combustion劍橋詞典a situation in which something suddenly starts to burn without any obvious cause 自燃 返回 spontaneous combustion