The 23 million-year-old creature was not a direct ancestor of today's seals, sea lions and walruses, a group known collectively as pinnipeds.
只2300万年
生物并
今海豹、海狮和海象直系祖先，而来自另一个分支。
The 23 million-year-old creature was not a direct ancestor of today's seals, sea lions and walruses, a group known collectively as pinnipeds.
只2300万年生物并今海豹、海狮和海象直系祖先，而来自另一个分支。
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、词性分类均由互联网资源自动生成，部分未经过人工审核，其表达内容亦
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