Howmenfirstlearnedtoinventwordsisunknown;inotherwords,t...
問題詳情：Howmenfirstlearnedtoinventwordsisunknown;inotherwords,theorigin(起源)oflanguageisamystery.Allwereallyknowisthatmen,unlikeanimals,somehowinventedcertainsoundstoexpressthoughtsandfeelings,action...