印欧语系的波动理论和谱系树说

那啥...弱弱地问一声:你也是安师大的?现在在上英语史的课?这个MS是咱作业啊??^^

前一个问看老师的笔记就好了,第二问我只找到了一点点中文的东西,你凑合着看看,能翻就给翻出来吧~~~^^

"谱系树说和波浪说是两个对立的理论模型，前者着眼于语言在时间上的有规律的发展，使语言间呈现出生物系族那样的异同关系，可以对有共同来源的语言进行历史比较研究；后者着眼于语言在空间上的扩散，强调语言间的相互影响和对语言演变规律的干扰。这两个理论模型与其说是对立，不如说是互补，可以各自弥补对方的一些弱点。它们对语言学往后的发展具有很大的影响。"

楼上的是朱H吧。。。我来BS一下。。。
What are the theories for the formation of language families and how are they used to explain the divergence or confluence of the historical development of languages?
Most languages people nowadays speaking can be classified into several language families: Chinese belongs to Sino-Tibetan; English belongs to Indo-European and so on. There are at least seven main language families in language world today.
People knew the languages are changing even before the creation of the theories for the formation of language families, but the creation of those theories is very important to explain the divergence or confluence of the historical development of l