By contrast, those who had either a long and a short version of the gene, or two short versions (and thus, presumably, more serotonin in the junctions), did not have such protective biases.

相反，那些带有一长一短，或者两短“版本”启动子基因的人就没有这种保护性的偏爱，而这种基因组合可能使得神经节中的血清素含量更高。

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By contrast, those who had either a long and a short version of the gene, or two short versions (and thus, presumably, more serotonin in the junctions), did not have such protective biases.

相反，那些带有一长一短，或者两短“版本”启动子基因的人就没有这种保护性的偏爱，而这种基因组合可能使得神经节中的血清素含量更高。

youdao