这个词是什么意思？
A plant genus of the family BETULACEAE. The tree has smooth, resinous, varicolored or white bark, marked by horizontal pores (lenticels), which usually peels horizontally in thin sheets.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D029662 · MeSH 2026。
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