When the elements are set, you must consider the hierarchy for each element.

当设置元素时，必须要考虑每个元素的层次结构。

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Consider the hierarchy for each element.

考虑每个元素的层次结构。

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At the bottom of the hierarchy is a task, the basic element of process activity.

该层次结构的底部是任务，任务是流程活动的基本组成部分。

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At the bottom of the hierarchy is a task, the basic element of process activity.

该层次结构的底部是任务，任务是流程活动的基本组成部分。

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