density of crown cover

常见例句

双语例句

• The species component, density and index of crown cover in the tree layer effect on distribution of illumination and under plants in the plant community.
  群落中光照的分布状况受乔木层的种类组成、密度与冠幅指数等因子的影响，且对下层植物分布有较大的作用。
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