So it is very important to find out the variation regulation of wood ring density in growth process.

解剖树木生长过程木材密度变化规律，研究年轮内密度的变化十分重要。

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Horizontal density variation (HDV) is an inherent characteristic of non-veneer wood composites.

平面密度变异是非单板类人造板所固有的结构特点。

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B. sinensis is more suitable for cultivating as good technological wood, as it exhibits medium growth rate, lower density but smaller radial variation;

伯乐树生长速度中等，木材密度略低，但其径向均匀性较高，宜作为优质的工艺材来培育；

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