n.[植]形成层；新生组织
The vascular cambium is located between the xylem and the phloem. 维管形成层位于木韧之间。
The base of scoin is cut diagonally to expose a large oval of cambium. 接穗的基部被切成斜形，暴露出椭圆形的大圈形成层。
The vascular cambium extends to form a complete ring of meristematic tissue around the stem, the separate vascular bundles being linked by interfascicular cambium. 维管形成层向两侧延伸直至形成一个茎内的分生组织环，各个维管束被束间形成层联系在一起。
n.前形成层
