在一些动物中，侧化只是对单爪或单脚的偏好，而在另一些动物中，则表现为更普遍的行为模式。

In some animals, lateralisation is simply a preference for a single paw or foot, while in others it appears in more general patterns of behaviour.

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然而，专家认为巴基鲸是已经灭绝的食肉哺乳动物中爪类和鲸类之间的过渡物种。

Other features, however, show experts that Pakicetus is a transitional form between a group of extinct flesh-eating mammals, the mesonychids, and cetaceans.

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又一次，人类可能会从他们最好的动物朋友那里得到“帮助之爪”或“帮助之鼻”。

Once again, humans may be getting a helping paw or nose—from their best animal friends.

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