the tree of evolution 生物进化树
New discoveries challenge Lucy's position on the tree of evolution.
然而新的发现则挑战露西在演化史上的地位。
But biologists reconstructing the mammalian tree of evolution from the DNA of living species have come to a different conclusion.
但是利用现存物种的DNA重建哺乳动物系统树的生物学家却得出了不同的结论。
Now, one way of representing the evolution of languages, showing the way languages are related to each other, is with the family tree model.
现在，描述语言的演化、展示语言之间的相互关系的一种方法，是用系谱图模型。
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