;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.
这只2300万年的生
是如今海豹、海狮和海象的直系祖先，而是来自另一个分支。
pinniped
/'pɪnɪped/ /'pɪnəpɛd/
adj. 鳍足类的
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相似单词
pinniform, pinnigrade, pinninerved, pinning, pinnings, pinniped, Pinnipedia, pinnipeds, pinnock, pinnoite,