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人為規定,不僅僅在數學.程式方面也有很多不成文的規定.如果你說X是因變數,很多人就不適應,總是少數服從多數的.所以按照規定來說是明智的.你列的方程不僅僅是你一個人看.m,n是常熟XY是變數這些都是習慣
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