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.
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。
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.
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。
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