Those who wish to teach students self-study textbooks to learn more about the knowledge back.
执教者希望学员们自学课本，了解有关背知识。
Its them who teach me knowledge and live happily.
是他们教给我知识，给了我幸福快乐的生活。
It's them who teach me knowledge and live happily.
是他们教给我知识，给了我幸福快乐的生活。
It's them who teach me knowledge and live happily.
是他们教给我知识，给了我幸福快乐的生活。
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