即在标准地中采用随机或机械抽样方法选取样木，进行树干解析，获得样木生长过程；
In sample plots, sample trees are randomly or systematically selected and growing process is studied by stem analysis.
不同生长速率的样木间该二性状差异很小。
No significant difference was also found among tree types with different growth rate for specific gravity and tracheid length.
明开夜合木是一种罕见的珍贵木料，它只生长在承德山区和避暑山庄内，木质洁白无瑕，细腻如玉，外观有如象牙一样。
Ming opening night Aiki is a rare, precious wood, which only grows in the mountains and the Summer Resort of Chengde, the wood perfectly clean, delicate jade, ivory-like appearance.
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