设想的生物的原始祖先。进化论确立以后，人们开始对生物的原始祖先进行探讨。
所以从头到脚，让人看到的是一个在黑猩猩和人类之间模棱两可的生物，这就是始祖地人猿。
So when you go from head to toe, you're seeing a mosaic creature that is neither chimpanzee, nor is it human.
他们发现，扁盘动物是离一切动物始祖位置最接近的活着的生物。
They have found that the placozoans are the closest living thing to the ancestor of all animals.
对舍尔来说，这种成功苦乐参半。 他出生在巴黎，但是，他的生物塑料业“始祖”的声誉是在美国确定的，而不是在他自己的家乡。
The success is bittersweet for Scheer, who was born in Paris but has become known as the one of the "grandfathers" of the bio-plastics industry in the United States, rather than in his home country.
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