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A soccer-field sized patch of forest in frigid Alaska has about 40 different species of plants,compared with about 70 in temperate England and 300 in the Amazonian rain forest.These biodiversity differences hold true for entire countries,too:England has 1500 plant species,while tropical Guyana,9000.
在极其寒冷的阿拉斯加 一块足球场大小的森林大约含有40种物种，与之相比 较温和的英国约有70种 亚马逊雨林则有300种。这种生物多样性差异对国家同样适用;英国有1500种植物，而热带圭亚有9000种.
The super diversity of tropical rainforests is only equalled in one other type of ecosystem on Earth:scrubby fire-prone shrublands that grow in western Australia and southern Africa.These shrublands may not look as majestic as tropical rainforests,but in a given area,they're home to similarly stupendous numbers of species.
热带雨林的生物多样性 仅相当于地球上另一个生态系统 澳大利亚西部和非洲南部 易发火灾的低矮灌木地 这些灌丛或许看起来没有热带雨林那么壮观，但在相同面积下 它们所包含的物种数是一样的。
Which doesn't necessarily mean that the rainforests and shrublands are easy places for plants to live.In fact,both ecosystems owe their enormous diversity,in part.to the fact that their soils have critically low supplies of nitrogen and especially phosphorus,nutrients plants need in order to grow.
这并不意味着热带雨林和灌丛是适宜植物生长的地方。事实上 这两个系统都不该拥有这么多物种，它们的...