cambium的复数形式怎么写

cambium的音标：cambium的英式发音音标为：['kæmbɪəm]cambium的美式发音音标为：['kæmbɪrm]...

n.形成层，新生组织...

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 callus originated from several parts , but mainly from cambium.愈伤组织是多起源的, 但主要源于形成层.A tissue produced inwardly by the cork ...