为了再现四个世纪之前的曼哈顿，他们需要回到这个岛屿最基础的生态学特征上，回到它的岩石结构和陆表地形。
To create an image of Manhattan four centuries ago, they took the island back to its ecological fundamentals, back to the bedrock and surface topology.
它也说明了一个基本的生态学原理：自从达尔文时代以来，科学家们已经注意到，岛屿常常是过大兽类和微型兽类的家园。
It also illustrates a fundamental ecological principle: Since Darwin's days, scientists have noticed that islands often are home to both oversized and miniaturized beasts.
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