基本解釋[經(jīng)濟(jì)學(xué)]銷(xiāo)售差益業(yè)務(wù)量差異專(zhuān)業(yè)釋義經(jīng)濟(jì)學(xué)銷(xiāo)售差益業(yè)務(wù)量差異