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本文简要介绍《信号与系统》（第二版）教材编写的工作情况，包括写作的指导思想、背景、主要内容及其变革和适用范围。结合教材修订本文就信号与系统课程建设和改革方面的一些问题表达了作者的意见。
This article gives a brief introduction to the writing of “Signals and Systems” (second edition) teaching materials, including the guiding ideology, background, main content of writing and its transformation and application. Combined with the textbook revision This article on the signal and system curriculum construction and reform of some of the questions express the author’s opinion.