sap wood
英
美
- sap n.树液；汁液；精力；易上当的人；地道v.挖地道；削弱；逐渐耗竭
- wood n.木材；木头；树林
名词 sapwood:
-
newly formed outer wood lying between the cambium and the heartwood of a tree or woody plant; usually light colored; active in water conduction
- Sapwood is the lighter colored wood growing from inside the bark to the heartwood.
边材色泽较浅，是从树皮到新材之间的木质部分。
- Heartwood is the mature wood, which is often darker, extending from the sapwood to the pith.
心材通常是成熟的木材部分，通常色泽较暗，范围从边材一直到髓心。
