height of tree-crown 树冠高度
With aid of the height of building, I could view the tree crown of willows.
借助于楼房的高度，我可以望见柳树的冠顶。
The "crown diameter-crown height" correlation equations and the formulas of three-dimensional vegetation quantity of tree crown are established.
建立常见绿化树种“冠径—冠高”相关方程和树冠绿化三维量计算公式。
Crown distribution diagram of the community. The crown depths were the difference between tree height and height of lowest leaves.
群落的树冠分布图树冠深度为树高与叶下高的差值。
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