灌木层中乔木树种和阳性乔灌木种类比例、相对密度和重要值均随坡位梯度从下部到上部逐渐增大。

Percentage, relative density and importance values of tree species and intolerant tree and shrub species increased while slope gradient from lower to upper.

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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。

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.

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任一种新鲜的或陈旧的易碎、芳香、呈黄色到红色的树脂，可从各种热带乔木中提取，用于某些清漆中。

Any of several brittle, aromatic, yellow to red resins of recent or fossil origin, obtained from various tropical trees and used in certain varnishes.

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