The Order could be the root of another hierarchy in the data model.
订单可能是数据模型中的其他层次的根。
We want to build a tree viewer that displays the hierarchy of a model.
我们的任务是，构建一个树形的查看器用以显示模型的层次结构。
This is part of another model hierarchy, explained next.
这是另一个模型层次结构(接下来将解释)的一部分。
Through analyzing vehicle accident a novel model of hierarchy has built in this paper.
通过对车辆事故的分析，建立了影响因素的层次结构模型。
Through analyzing vehicle accident a novel model of hierarchy has built in this paper.
通过对车辆事故的分析，建立了影响因素的层次结构模型。
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