名词
中文翻译：外导木
同义词：
['outer wood', "outer xylem例句：1. The tree's outer xylem is rotting away due to the lack of water.（由于缺水，这棵树的外导木正在腐烂。）"]
例句：
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1. The tree's outer xylem is rotting away due to the lack of water.
由于缺水，这棵树的外导木正在腐烂。
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2.The scientist studied the growth patterns of the outer xylem in different species of trees.
科学家研究了不同树种外导木的生长模式。
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3. The construction crew was working on replacing the damaged outer xylem of the bridge.
施工队正在更换桥梁受损的外导木。