It is an important work about the nineteenth century’s Hesperian depictive linguistics and comparative linguistics combining with the research of Beijing Mandarin.
PIE was the language supposedly spoken near the Black Sea between 4000 and 2000 B.C. There are no records of it, but scholars have reconstructed it through the method of comparative linguistics.
写语言学和
较语言学同
研究相结合的作品。
学和
》阅读
选
，PIE 
公元前 4000 年至 2000 年间在黑海附近使用的语
