“边材”造句

边材含有木质导管, 但不如中心木质那样坚硬.
Sapwood contains xylem vessels, but not as strong as heartwood.

毛白杨边材材色株间存在显著差异.
Thecolor of sapwood of Chinese white poplar among trees has significant difference.

边材色稍浅,仅导管槽带有红色.
Sapwood pale colored with red vessel stripes.

• #边材