单词 | 树龄 |
释义 | 〔heartwood〕The older, inactive central wood of a tree or woody plant, usually darker and harder than the younger sapwood. Also called duramen 心材,树干:树木或木本植物中较老的不再生长的部分,通常比树龄短的边材更硬且颜色更深 也作 duramen |
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