A series of discoveries by different groups of researchers have zeroed in on a highly conserved (nonmutated) region of the virus.

不同的研究团体的一系列发现都集中在这种病毒非常保守（不变异）的部分。

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This process is highly conserved in eukaryotes.

该过程在进化过程中高度保守。

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Mitochondrial DNA sequence is highly conserved within species.

线粒体基因组具有种内高度保守性。

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The researchers also found that long non-coding segments that are not conserved in other mammals are in fact highly constrained in humans, suggesting they have human-specific functions.

ECONOMIST: Evolution