secondary medullary ray
常見例句
- It is a lateral meristem and contains fusiform initials giving rise to secondary xylem and phloem and ray initials giving rise to medullary rays. See also secondary growth.
維琯形成層屬於側(cè)生分生組織，包括能夠産生次生木質(zhì)部與次生靭皮部的紡鎚狀形成層原始細(xì)胞和産生髓射線的射線原始細(xì)胞。
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