导管是对酸雨敏感的一种组织，受害材导管的弦向直径小于健康材。
Vessel is known to be sensitive to acid rain, its tangential diameter of diseased poplar decreased than that of healthy poplar.
导管是对酸雨敏感的一种组织，受害材导管的弦向直径小于健康材。
Vessel is known to be sensitive to acid rain, its tangential diameter of diseased poplar decreased than that of healthy poplar.
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