茎或枝树皮正下方的木材；与心材在颜色和生理活动(汁液流动)上不同。
茎或枝树皮正下方的木材；与心材在颜色和生理活动(汁液流动)上不同。；边材；[机] 边材
茎或枝树皮正下方的木材；与心材在颜色和生理活动(汁液流动)上不同。
The wood just under the bark of a stem or branch; it differs from the heartwood in color and in physiologic activity (flow of sap).
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