The common detailed design found among the pinnipeds probably indicates a common ancestor.
在鳍足类动物中发现的共同的细节设计，这可能说明了它们有一个共同的祖先。
Biologists have long maintained that two groups of pinnipeds, sea lions and walruses, are descended from response to similar environmental pressures.
生物学家们长期认为，两类鳍脚亚目动物，即海狮和海象，都是从一种陆地上的类似于熊的动物繁衍而来的。
Pinnipeds are able to distinguish an object's shape by its wake.
鳍脚类动物能以目标的尾流分辨其形状。
Pinnipeds are able to distinguish an object's shape by its wake.
鳍脚类动物能以目标的尾流分辨其形状。
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