1. Early embryos of many species develop ancestral features.
许多物种的早期胚胎具有其祖先的特性。
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2. This ancestral species might have evolved at a time when the islands were connected.
这种祖先物种可能是在岛屿相连的时候进化而来的。
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3. Of today's different groups of algae, green algae are probably the most similar to ancestral plants.
在今天的众多藻类中，绿藻可能与植物的祖先最为相似。
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4. If for any reason this does not happen, the ancestral feature may not disappear, leading to an atavism.
如果因为任何原因，这些事情没有发生，祖先的种种特性也许就不会消失，从而导致返祖现象。
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5. The first, Paleo-Indian, wave more than 15,000 years ago was ancestral to all Central and South American Indians.
在一万五千多年前进行第一次迁移的是古印度人，他们是美洲中部和南部的印第安人的祖先。
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6. There's a lot of frying going on at this particular place and this is something that's not typical of ancestral human diets.
在这个地方，有很多油炸食品，但这不是我们祖先的日常饮食。
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7. Perhaps that is why we explore the starry skies, as if answering a primal calling to know ourselves and our true ancestral homes.
也许这就是我们探索星空的原因，仿佛在回应一种原始的召唤，去了解我们自己和我们祖先真正的家园。
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8. The third wave, perhaps 10,000 or 9,000 years ago, saw the migration from North-east Asia of groups ancestral to the modern Eskimo and Aleut.
第三次浪潮大约发生在一万或九千年前，见证了东北亚的祖先群体向现代爱斯基摩人和阿留申人的迁移。
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9. Founder mutations are a class of disease-causing genetic mutations, each derived from its own ancestral "founder" in whom the mutation originated.
创始者突变是一类引起疾病的基因突变，每一种都源自其自身祖先的“创始者”。
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10. We speak a decimal language because an ancestral tongue, proto-Indo-European, was decimally based.
我们说的是十进制的语言，这是因为我们的始祖语言——原始印欧语——是基于十进制的。
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11. Fossils show how the nostrils of ancestral whales moved from the tip of the snout to the top of the head.
化石展现了鲸鱼的鼻孔是如何一步步地从它们祖先长鼻子的末端跑到头顶上去的。
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12. Nunavut believe their best hope of survival in this changing environment lies in combining their ancestral knowledge with the best modern science.
努纳武特人认为生存于不断变化的环境的最大希望在于结合先人的智慧与先进的现代科学。
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13. An ancestral species might have adapted to exploit a particular ecological niche on one island and then traveled over water to colonize other islands.
一个原始物种可能已经适应了利用一个岛屿上特定的生态位，然后在水上迁徙到其他岛屿定居。
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14. Perhaps the most striking sign of mobility is the fact that by the third millennium B.C., most pastoralists in this huge region spoke related languages ancestral to the modern Indo-European languages.
