单词：fossil species
单词：fossil species 相关文章
Well, as you learn in life science and then later on in biology, different species have different features. And if you were an expert -- and some of you will be one day -- you'll be able look at the different whales and know which one is which. But s
CNN2010年(九)月
Science and technology 科学与技术 Splay-footed, not flat-footed 不是扁平足而是八字足 A new fossil shows that evolution does not always mean change 新发现的化石显示，进化并不总意味着变化 Palaeontology 古生物学 The
经济学人科技系列
Science and Technology Palaeontology Splay-footed, not flat-footed 科技 古生物学 不是扁平足而是八字足 A new fossil shows that evolution does not always mean change 新发现的化石显示，进化并不总意味着变化 WHEN a coela
经济学人科技系列
When we lose reefs, we lose basically the cradles of evolution in the oceans. Wolfgang Kiessling A new study out this week highlights the role that coral reefs play in evolution, adding another reason to preserve these delicate, diverse, and often be
VOA标准英语2010年(一月)
Science and technology 科学技术 Palaeontology 古生物学 Remember the tooth 牙齿的痕迹 A link is made in an ancient ecosystem 古代生态系统中的线索 WHO ate whom in the food chains of the past is rarely clear. 在古代谁以吃谁为
经济学人科技系列
Only about one bone in a billion, it is thought, ever becomes fossilized. 据认为，在10亿根骨头当中，只有大约l根能变成化石。 If that is so, it means that the complete fossil legacy of all the Americans alive todaythat's 270 mill
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