A trace relationship between the original requirement and the branch requirement can help you stay in touch with changes that are made to requirements by other teams.

原始需求与分支需求之间的追溯关系，可以帮助您对其他团队对需求所做的变更能保持一致。

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One mechanism that can be used is to establish a trace relationship between the original and the branch requirement (Figure 13. Tracking original and branch requirement by trace relationship).

可以使用的另一种机制，就是创建原始需求与分支需求之间的追溯关系(图13，“通过追溯关系来追踪原始的和已分支的需求”)。

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Documentation is established for what the origin of the branch requirement is (the direction of the trace relationship could be from the original to the branch requirement).

有一些文档是为分支需求的起源而建立起来(追溯关系的方向，可以是从原始的需求到分支之后的需求)。

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By current means, it could take researchers years to trace the 10, 000 or so synapses that branch from just a single neuron.

WSJ: Brain Science: Mysterious Neural Circuitry Becomes Viewable