基本解釋[經(jīng)濟(jì)學(xué)]營(yíng)銷(xiāo)短邊傚應(yīng)專(zhuān)業(yè)釋義經(jīng)濟(jì)學(xué)營(yíng)銷(xiāo)短邊傚應(yīng)