The traditional Aggregated Multicast was divided the problem into three sub-problems, namely, candidate tree generation, tree selection and group-to-tree mapping.

传统的聚合组播包括三个主要步骤，分别是候选树生成，树选择和组树匹配。

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If the checksum has not changed, the unstable tree is searched for the candidate page.

如果校验和没有更改，则会搜索不稳定树以寻找候选页面。

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If the candidate page is found in the stable tree, then it is merged and the candidate page freed.

如果候选页面位于稳定树中，则该页面被合并，候选页面被释放。

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But Kerry the presidential candidate had caved to Democrat pressure groups: unions and tree huggers.

FORBES: Whither the Democrats