From the course of "Circuit and Signal", it can be noticed that the needs of the users of mathematical tools and maths itself to mathematics are different.
文章从《电路与信号》课程着眼，注意到数学工具的用户和数学本身对数学要求的不同。
The second part puts forward the theoretical classfication and instrction of mathematical exercises because the compiler could use it as he needs in fact.
依据数学习题在理论上的分类及功能，使编者应掌握习题的这些分类和功能，以便根据实际需要来编制习题。
It needs a good knowledge of the mathematical background inherent in statistical methodology, in order to understand the various fields of applications.
它为统计方法学所固有需要良好的数学背景知识，为了理解应用的各种各样的领域。
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