Moreover, the bones in the front part of a baleen whale's lower jaw, or mandible, aren't fused as they are in other mammals.

另外，须鲸下颚前部的骨骼，也就是所说的下颌骨，并不像其他哺乳动物一样是愈合在一起的。

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A more likely explanation, he offers, is that the rogue mandible comes from a male and the rest of the bones belong to females.

他认为，更接近真相的解释是，那个巨大的下颚骨是男性留下的，其他的化石则全是女性的。

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