音标：[ˌɔpəˈreiʃənəl laif] ；

使用年限

operational life的用法和样例：

例句

A capital lease pays for property over the term of its useful life.资本租赁指在资产的有效使用年限内支付其费用。
Ok, are all the fixed assets depreciated over their useful life?好的，所有的固定资产都根据使用年限提折旧吗？

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