1.they must work hard if he wants to learn another language well2.in chinese:"回答这个问题是困难的"3.in chinese:"用他们自己的语言"4.自学本文主要讲述了世界上语言的发展,着重介绍了英语的推广使用,以中国人学习英语的方法、目的阐述。...
1. One must work hard to learn another language.2. There are many reasons to this question.3. It means mother/native language.4. 自学。大意:世界上一共有30多亿人口,差不多2500种语言。只有12种语言被超...