Scientists are attempting to compare features of extinct animals with living analogues.

科学家正试图把已灭绝动物的特征与现存类似动物相比较。

《牛津词典》

There's always some guesswork when studying extinct animals.

在研究灭绝的动物时，总要做一些猜测。

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But in fact we are a long way from being able to clone extinct animals.

但事实上，想要克隆绝种动物，我们还要很长的路程要走。

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So extinct animals were being succeeded by related living types.

BBC: Darwin's twin track: 'Evolution and emancipation'

There's always the emphasis on saving animals, but actually if you don't save the plants then everything will go extinct.

CNN: Half of magnolias face extinction