Some types of work items contain information relative to the time scales, and others do not, so we have to use different algorithms to calculate the work item status of different types of work items.

有一些类型的工作项包含了与时间计算相关的信息，而有的则不含，所以我们必须使用不同的算法，来估计不同类型工作项的工作项状态。

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