sapwood

• 树木或木本植物中位于形成层与心材之间的、通常颜色较浅的外层木质部，负责输导水分和养分。

The newly formed, usually lighter-colored outer layer of wood in a tree or woody plant, located between the cambium and the heartwood, which is active in conducting water and nutrients.

不可数

1. Outer wood layerC1formal

   The newly formed, softer outer layer of wood in a tree, located between the bark and the heartwood, which is usually lighter in color and actively conducts water and nutrients.

   边材

   • The carpenter explained that sapwood is more susceptible to decay than heartwood.
   • In many trees, the sapwood is lighter in color and contains living cells.
   • The tree's sapwood is responsible for transporting water from the roots to the leaves.