This is simply unavoidable and must be considered in your cost model.
这是不可避免的，并且应该在您的成本模型中加以考虑。
The software upgrading cost is unavoidable in the use of most of software, but it can't keep the same in accounting treatment.
软件升级费用是绝大多数软件在使用过程中不可避免的，但在会计处理上不能一概而论。
This involves an unavoidable computational cost.
这会造成无可避免的计算成本。
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