这个词是什么意思？
A product of hard secondary xylem composed of CELLULOSE, hemicellulose, and LIGNANS, that is under the bark of trees and shrubs. It is used in construction and as a source of CHARCOAL and many other products.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D014934 · MeSH 2026。
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