有林地、疏林地和灌木林地中防护林与经济林的面积比例约为34：1。

The area ratio of protection forest and economic forest in forest land, thin stocked land and shrubbery land is about 34:1.

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当前，没有能够创建链接到一系列生物学数据库的面积比例文氏图程序可用。

Currently there are no programs available that can create area-proportional Venn diagrams connected to a wide range of biological databases.

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天然林斑块的面积比例都在85%以上，人工林斑块面积比例都在15%左右。

The area percentage of natural forest is above 85%, and the percentage of plantation is about 15%.

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