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。
An ancestral species might have adapted to exploit a particular ecological niche on one island and then traveled over water to colonize other islands.
考虑到地球上的生命的非凡多样性，一定存在着形成物种的机制：从一个原始物种演变为两个物种。
Given the extraordinary diversity of life on the planet, there must be mechanisms for speciation: the formation of two species from one original species.
岛上大约95%的原始物种存活了下来。
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