教育理论研究有何特点?
索绪尔在《普通语言学教程》中说:“By distinguishing between the language itself and speech,we distinguish at the same time:(1)what is social from what is individual,and(2) what is essenatial from what is ancillary and more or less accidental。请翻译这段话,并谈谈区分语言和言语的意义。[中山大学]