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 ...
It cost me a lot of money to knock into shape.我花了一大笔钱才把它修整得像个样子.I was so hurried as to knock into my teacher.我如此匆忙以至于撞到老师身上.Stop! you will knock into the tree.停! 你要撞到那棵树了....