单词：vascular cambium
vascular cambium的用法和样例：
例句
- The vascular cambium is located between the xylem and the phloem.维管形成层位于木韧之间。
- Secondary vascular tissue, found only in plants with secondary thickening, develops from the vascular cambium.次生维管组织由维管形成层发育而来，仅存在于有次生加厚的植物中。
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