牙仙，这个input我看到说从1888年就有了

来源: 于 2011-09-23 09:52:06 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

还有其他很多inb-，inp-的词。For ease of articulation, speakers tend to pronounce them as imb or imp because n can assimilate with b/p and become m, which is called "assimilation" in linguistic terms.