| 单词 | 心材 |
| 释义 | 〔catechu〕A spiny Asian tree(Acacia catechu) having bipinnately compound leaves, spikes of yellow flowers, and dark heartwood. 儿茶树：一种亚洲生多刺木（儿茶 金合欢属） ，有两羽状复叶、穗状黄花和深色心材 〔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〔catechu〕A raw material obtained from the heartwood of this plant, used in the preparation of tannins and brown dyes. Also called cutch 儿茶：从这种植物的心材中提取的原料，用于生产单宁酸和棕色染料 也作 cutch |
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