cambium

UK:  ['kæmbɪəm]

US:  ['kæmbɪəm]

复数：cambiums  

n.

1.【植物;植物学】形成层,新生层

v.

1.形成新生层

1 . The incision must be deep enough to penetrate the secondary cambium, where the secretary canals lie.
切口必须足够深穿透二手层，那里局长运河之所在。

2 . One must be able to differentiate between cambium and heartwood when buying furniture.
家具的时候，一定要分辨边材和心材。

3 . The flow of food and water between the roots and leaves is accomplished by layers of cells formed by the cambium.
由形成层构成的细胞层，负责在根和叶之间运输食物和水分。

4 . After primary growth, the vascular cambium in the rhizome of these plants becomes active, develops bast outward and wood inward.
这些植物在初生生长结束后，根茎中的维管形成层开始活动，向外发展出韧皮，向内发展出木材。

5 . The outermost layers of a woody stem including all of the living and nonliving tissues external to the cambium.
木质茎的最外层，包括形成层以外全部活的和死的组织。