In several cases, scientists can see how complex carnivorous plants evolvedfrom simpler ones.
在一些案例中，科学家可以看到复杂的食肉植物是如何从简单的植物进化而来的。
2
Traditional marriage has evolvedfrom a near-universal ritual to a luxury for the educated and affluent.
传统婚姻已经从一种近乎普遍的仪式演变为受过良好教育和富裕阶层的奢侈品。
3
From a detailed analysis of the salamanders' family tree, however, it is clear that the other lineages evolvedfrom an ancestor that itself had lost the ability to metamorphose.