Use this function to calculate the depreciation amount for one period of the total depreciation span of an object. Arithmetic declining depreciation reduces the depreciation amount from period to period by a fixed sum.
借助这个函数功能您能够计算一项资产在指定周期内的折旧额。采用数字型折旧方法时在每个周期内折旧金额的递减值是恒定的。