[, ] () the cost of producing, buying or providing one item 单位成本◆The more goods that are produced, the lower the unit cost. 产量越高，单位成本越低。◆The department's PCs have a unit cost of $2 000 and a life expectancy of 3 years. 这个部门的个人电脑单位成本为 2000 元，使用年限为 3 年。