Cambium
01
形成层, 骨膜的内层
the inner layer of the periosteum
02
形成层, 分生组织
a layer of actively dividing cells in plants, responsible for secondary growth by producing new xylem and phloem tissues
例子
The vascular cambium in trees adds layers of wood and bark each year, contributing to trunk growth.
树木中的维管形成层每年都会增加木材和树皮的层数，有助于树干的生长。
Cork cambium produces cork cells in the outer bark of woody plants, providing protection and insulation.
形成层在木本植物的外树皮中产生软木细胞，提供保护和绝缘。
