a formative one-cell layer of tissue between xylem and phloem in most vascular plants that is responsible for secondary growth
the inner layer of the periosteum
造句
用作名詞(n.)
The vascular cambium is located between the xylem and the phloem. 維管形成層位于木韌之間。
The base of scoin is cut diagonally to expose a large oval of cambium. 接穗的基部被切成斜形，暴露出橢圓形的大圈形成層。
The vascular cambium extends to form a complete ring of meristematic tissue around the stem, the separate vascular bundles being linked by interfascicular cambium. 維管形成層向兩側延伸直至形成一個莖內的分生組織環，各個維管束被束間形成層聯系在一起。