heart·wood 
(härtwd′)
(härtwd′)n.
The older, nonliving central wood of a tree or shrub, usually darker and harder than the younger sapwood. Also called duramen.
| 单词 | heartwood |
| 释义 | heart·wood (härtwd′)n. The older, nonliving central wood of a tree or shrub, usually darker and harder than the younger sapwood. Also called duramen. |
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