许多语法学著作在谈到双音节词时,时常将“蝴蝶”引例其中。“蝴蝶”是由两个音节构成的无可厚非,但“蝴蝶”一词是由几个语素构成的,争议颇多,直到现在学术界也尚无定论。本文分别对“蝶”和“蝴”进行分析,在综各家之说的同时,提出一己之见。旨在以“蝴蝶”为例,再次引起学者对一些特殊双音节词的关注,以期找到一种更好的鉴别双音节语素的方法。 Many grammar books often quote “butterflies” when it comes to disyllabic words. “Butterfly” is made up of two syllables, but the word “butterfly” is composed of several morphemes. There are a lot of controversies. Up to now, there is still no conclusion in academia. This paper analyzes “Butterfly” and “Butterfly” respectively, and at the same time, puts forward my own opinions. With the example of “Butterfly”, the author once again aroused the attention of scholars on some special disyllabic words in order to find a better way to distinguish disyllabic morphemes.