proportional cost

• 比例费用

proportional cost的用法和样例：

例句

1. Profit goes up in proportion to the fall in overhead cost.
   利润上升与间接费用成本下降成比例。
2. The ultraviolet lamp is guaranteed for 1 year with a prorated replacement cost.
   另外，紫外灯保用一年，替换费用按比例计算。