This is a very good teaching material to help you learn more about the principle of knowledge communication.
这是一个很好用的教材，帮助大家了解更多的通讯原理知识。
The advanced maths of the university is the same as aid that I use this part, altogether two, it is very good teaching material.
这部分我用的同济大学的高等数学，一共两册，是很不错的教材。
In fact, a good teacher should know how to use the simplest teaching material to teach well.
事实上一个好的老师应该知道如何用最简单的教学用具上好课。
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