通过合理地计划产品品种的生产，可以获得更多的利润，降低单位成本。

By optimizing producing plan according to system quality level, one can get more benefit and reduce unit cost.

youdao

建筑材料，是很常见的获得批量采购的折扣，所以购买的单位成本下降，从量的增加。

For construction materials, it is common to receive discounts for bulk purchases, so the unit purchase cost declines as quantity increases.

youdao

建筑材料，是很常见的获得批量采购的折扣，所以购买的单位成本下降，从量的增加。

For construction materials, it is common to receive discounts for bulk purchases, so the unit purchase cost declines as quantity increases.

youdao