达尔文注意到，所有这些蜥蜴都和在南美发现的蜥蜴相似，但他们都很不一样，或者说改变了，从而使它们在加拉帕哥斯群岛的环境中生存下来。

Darwin noted that all these species were similar to those found in South America. But, they all had differences, or adaptations, that helped them survive in the environment of the Galapagos Islands.

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