基本解釋[經(jīng)濟(jì)學(xué)]平衡購(gòu)入點(diǎn)平衡進(jìn)貨點(diǎn)專(zhuān)業(yè)釋義經(jīng)濟(jì)學(xué)平衡購(gòu)入點(diǎn)平衡進(jìn)貨點(diǎn)