To fully utilize the flood detention action of natural tree vegetation it could reduce the destruction of the nature.
充分利用自然林木植被的滞洪作用，减少对自然的破坏。
In particular, a taxonomy of subjects has a natural tree structure that can have a straightforward representation as a specialized DITA map.
具体来说，主题的分类法有种自然的树状结构，可以直接用专门化的dita图表示。
This paper introduces the theory foundation and the display algorithm of the fractal graphics, which has been applied into the three dimensional display of the natural tree.
介绍了分数维图形的理论基础及其显示算法，并应用到自然树木的三维显示中。
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