而且我们在他背包里发现了一把折叠刀.Andwe found a folding knife in his back pocket.那里还卖瑞士军用折叠刀,二十美元.They had a Swiss Army knife for $ 20.我花十美元买了一把非常好的折叠刀.I got a really good pocketknife for $ 10....
The learner corpus - based approaches include CIA ( Contrastive Interlanguage Analysis ) and CEA ( Computer - aided Error Analysis ).其研究方法包括中介语对比分析和计算机辅助错误分析.The study of fossilization in interlanguage is of great help t...