1·At this point the subpopulations have evolved into distinct species.
这时，亚种群已经进化成不同的物种。
2·Later ancestors still evolved back into the water and became sea turtles.
后来的祖先仍然进化回水中，变成了海龟。
3·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。
4·That may be a hint that yawn evolved as a social cue—"time for us all to go to bed".
也许这是打哈欠进化为社交线索的一种暗示——“到我们大家睡觉的时间了”。
5·Wild carrots probably evolved with the other flowering plants about 360 million years ago.
在大约3.6亿年前，野生胡萝卜也许是和其它开花植物一起进化的。