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1.no trace of 没有...的踪迹
This would explain why the human genome has no trace of Neanderthal DNA despite the two similar species living close together for millennia.
这可能解释为什么人类的基因组没有尼安得特人的痕迹，即便这两个物种在一起生活了几千年。
2.emerge from 自…出现
A ragged man emerged from behind the tree.
一个衣衫褴褛的男人从树后面走出来。
3.unrelate to 与...无关
They don't understand that the compassion I show outside of the workplace is completely unrelated to my leniency at work.
他们不明白的是，我在工作场所以外所表现出来的仁慈，和我在工作中的宽容是完全不相干的。
