常見例句Sheil--Small[1] discussed the Fourier series of a step function while thisthesis implements a detailed discussion and illustration on the properties of the step func-tions concerned in [1]. Sheil-Small [1]討論了階梯函數(shù)的Fourier級(jí)數(shù)。 本文對(duì)[1]中所涉及到一些階梯函數(shù)的性質(zhì)進(jìn)行了詳細(xì)討論,并給出了詳細(xì)證明。river-snail sheil 田螺殼 返回 Sheil