Their allele frequencies at numerous genetic loci gradually become more and more different as new alleles independently arise by mutation in each population.

随着新等位基因在每个群体中独立突变产生，它们在许多遗传位点上的等位基因频率逐渐变得越来越不同。

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But the concept has gradually become more accepted.

但是，面部移植这一概念已经逐渐变得更加为人们所接受。

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Anonymity online will gradually become a lot like anonymity in the real world.

网络匿名将逐渐变得更像现实世界中的匿名。

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But almost all colon cancers begin as benign polyps that gradually become malignant over about 10-15 years.

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Without treatment, signs and symptoms gradually become more severe and your thyroid gland may become enlarged (goiter).

CNN: Hashimoto's disease

My hope was that during our two weeks of filming, what began as competition would gradually become cooperation.

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