然而这种标记不是来源于已知基因，它的功能不为人知。
This snip is not from any known gene, and its function is unknown.
基因标记会在短时间内将新特性传递给下一代。
These genetic imprints can short-circuit evolution and pass along new traits in a single generation.
他们说7%的人类基因都有自然选择的标记。
They say that some 7percent of human genes bear the signature of natural selection.
他们说7%的人类基因都有自然选择的标记。
They say that some 7percent of human genes bear the signature of natural selection.
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