1·The base of scion 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。
2·The growth of hypogeal stem contain tri-growth, and the anomalous secondary growth is the result of supernumerary cambium that derived from the outmost elements of secondary phloem.
地下茎加粗过程中形成三生结构，其异常结构是由于次生韧皮部外侧发生的额外形成层所致，其起源于薄壁细胞；
3·Wood is the product of cambial activity in trees, and the seasonal activity style of cambium directly influences wood biomass production, structures and properties.
木材（次生木质部）是树木形成层细胞分化的产物，形成层的活动方式不仅影响木材的产量，而且影响木材的结构和性质。
4·Wood formation is a complex process composing many biological events, occurs as a result of growth and differentiation of the vascular cambium.
木材形成是一个复杂的生物学过程，是维管形成层生长和分化出次生组织的结果。
5·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。