从一个古代北极熊颚骨上测得的最古老哺乳动物基因组，为动物与气候的紧密相关提供了线索。
The sequencing of the oldest mammalian genome from an ancient polar bear jawbone provides clues about these.
趣味的线索从此与科技的线索紧密携手，寻访者也从秃顶摄影师扩充为一个小分队。
From now on, the theme of the exotic would tightly grasp that of the scientific motif, and the searchers would be enlarged from just the bald photographer to a small party.
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