These figures are included to give you some idea of the size of the job and must not be considered accurate enough for cost-estimatingjobs.
这些数据会使你了解维修工作的规模，但并非精确到可以做为维修价格的参考。
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That's one of the benefits of estimating: Parametric modeling gives us visibility into resource utilization, allowing us to do our jobs more quickly, more efficiently, and more accurately.