使用单基因作为系统发育的标记，在有水平基因转移存在的情况下很难追查生物的系统发育。

Using single genes as phylogenetic markers, it is difficult to trace organismal phylogeny in the presence of HGT .

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基因转移的潜在优势是单次治疗能持续数月。而在本研究中，疗效能够维持研究所需的24周。

A possible advantage of gene transfer is that a single treatment could last for months. in the current study improvements were maintained through the24weeks of study.

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