The whale retained a tail and lacked a fluke, the major means of locomotion in modern cetaceans.

这种鲸保留了尾巴，没有现代水生鲸类动物用于行动的主要部位，尾片。

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The whale retained a tail and lacked a fluke, the major means of locomotion in modern cetaceans.

这种鲸保留了尾巴，没有现代水生鲸类动物用于行动的主要部位，尾片。

youdao