economic service life的用法和樣例：
例句
- Each of these degradations represents an economic life period in a different service.
每一次降級均代表在不同服務(wù)崗位上的經(jīng)濟壽命期。 - To do the calculation, you will have to prepare a spreadsheet table showing all costs after taxes over each investment's economic life.
為了完成計算，你將必須準備一張顯示每種投資在其經(jīng)濟壽命期間的全部稅后成本的電子表格。
