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汉语拼音：fèn zǐ zhōng

一种精密计时仪器。利用分子能级跃迁吸收或发射一定频率电磁波的特性制成。可用来校正石英钟及作为频率标准。

• They then used a so-called "molecular clock" technique to put dates on the evolutionary story of rice.

  之后，科研人员使用一种叫做“分子钟”的技术将遗传数据置入水稻的进化史中。

• Depending on how the researchers calibrated their clock, the data point to an origin of domesticated rice around 8, 200 years ago.

  通过科研人员校对“分子钟”，数据显示出该驯化水稻在大约8200年前的原始稻种。

• Her age is calculated based on the molecular clock technique of correlating elapsed time with observed genetic drift.

  她的年龄计算是基于与随着时间流逝而观测到的基因演变相关的分子钟技术。

• However, the molecular clock is almost always violated in comparisons of distantly related species, such as different orders of mammals.

  另一方面，在远缘物种（例如哺乳纲不同目的动物）的比较中，分子钟几乎总是不成立的。

• According to molecular clock, Yuzhong population and Geermu population divaricated to other populations at 200 thousand years ago.

  根据分子钟分析，格尔木种群和榆中种群是大约在20万年前与其他种群产生分歧的。

• Fossil Records and Molecular Clock Study of the Time of Origin of the Precambrian Biologic Lineages

  前寒武纪生物起源时间的化石和分子钟研究