约翰逊还提供了估算成本的成本明细表，实际上需要20年的维护成本，现值折旧率为5%。

Johnson also offers a cost breakdown of how that cost works. And yes, it's actually a 20-year cost, discounted back to present value using a 5% discount rate.

youdao

约翰逊还提供了估算成本的成本明细表，实际上需要20年的维护成本，现值折旧率为5%。

Johnson also offers a cost breakdown of how that cost works. And yes, it's actually a 20-year cost, discounted back to present value using a 5% discount rate.

youdao