基本解釋[數(shù)學(xué)]左導(dǎo)數(shù)左微商詞組短語短語h -derivative on te left 左可導(dǎo)derivative on the left更多詞組專業(yè)釋義數(shù)學(xué)左導(dǎo)數(shù)左微商