Whenever I travel to speak I invariably learn as much as the students I teach.
不论什么时候去旅行做演讲，我教的和我的学生们学到总会一样多。
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。
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。
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