CLEC has the excellent stability, activity, mechanical strength.

它在稳定性, 活性, 机械强度方面均有突出的优势.

A learner corpus CLEC was born by the end of 1990 s.

90年代末,我国的第一个学习者语料库CLEC问世.

A learner corpus CLEC was born by the end of 1990s.

90年代末，我国的第一个学习者语料库CLEC问世。

Corpus approach is adopted in the present study . CLEC is the corpus we used.

该研究采用了语料库的研究方法,运用了CLEC语料库.