较古老的冰川物质层之间是发育良好的土壤，它含有（生活在）温暖气候中的植物的化石。
Between the older layers of glacial material were well-developed soils containing fossils of warm-climate plants.
我们发现有必要处理的气候、土壤、植物以及诸如此类的因素。上述因素对所有生物所处环境是有共性的。
We find that we have to deal with things like climate, soil, plants, and such-like factors common to all biological situations.
当然，夏威夷群岛的自然环境—适宜的气候，充沛的降雨，肥沃的土壤都为迁移来的动植物的生长及繁衍创造了良好的条件，从而引发了上面的问题。
Much of the problem has to do with the nature of the islands themselves. Their moderate climate, plentiful rainfall, and fertile soil cause most immigrants to live long and prosper.
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