说明：真正的源码，需要的朋友可以下载看看，只为学习所用。
The real source, a friend in need can be downloaded to see, only used for learning.
辅导他人的学生在考试中比那些只为自己学习的学生得分更高。
Student teachers score higher on tests than pupils who're learning only for their own sake.
我们拥有一大批专家，他们联手工作只为实现一个共同目标：打造成出尽可能最好的语言学习工具。
We house a broad range of experts united by the common goal of creating the best language learning tools possible.
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