2005年，两个小组共同协作对古生代穴熊的2.7万个DNA碱基进行了排序。

In 2005, two teams worked together to sequence 27,000 bases of ancient cave bear DNA.

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这些猎人就在离熊穴不远的地方走了过去。

These hunters passed within a stone's cast of the bear's den.

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这些猎人就在离熊穴不远的地方走了过去。

These hunters passed within a stone's cast of the bear's den.

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