Sapwood

[sæpwud]

解释:

(noun.) newly formed outer wood lying between the cambium and the heartwood of a tree or woody plant; usually light colored; active in water conduction.

鲍里斯校对--From WordNet

解释:

(n.) The alburnum, or part of the wood of any exogenous tree next to the bark, being that portion of the tree through which the sap flows most freely; -- distinguished from heartwood.

校对:莫利