自40年代初西方学者就对第二语言学习动机进行了大量研究，取得了丰硕的研究成果。
The western scholars have conducted massive research since the beginning of the 1940s about the second language study motivation and they have obtained the plentiful research results.
经过几十年的探索，语法学界关于副词的研究形成了多样的研究方法，取得了丰硕的研究成果。
Through several decades probing, grammar academic has formed diversified studying method about the research of adverb and acquired plentiful fruits.
经过几十年的探索，语法学界关于转折连词的研究形成了多样的研究方法，取得了丰硕的研究成果。
Through several decades study, grammar academic circle has formed diversified studying methods about the research of adversative conjunctions and acquired plentiful fruits.
应用推荐