Geneticists speak of the “molecular clock” that recordsthe passage of time. These molecular data also show how variousorganisms are transitional within evolution.
遗传学家所说的“分子钟（molecular clock）”记录了这一进程，这些分子数据也说明了进化中各物种的过渡关系。
Based on genetic distances, molecular evolution rates established by the hypothesis of molecular clock can be used to deduce the origin or divergence time of different organism taxa.
基于生物的遗传距离所建立的分子进化速率，可用于进一步推测不同生物类群在进化历史上的分歧时间。
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