secondary medullary ray
常见例句
- 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.
維琯形成層屬於側生分生組織，包括能夠産生次生木質部與次生靭皮部的紡鎚狀形成層原始細胞和産生髓射線的射線原始細胞。
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