vascular cylinder

常见例句

雙語例句

• The central cylinder in which the primary vascular tissue is arranged around a pith, as in most seed plants.
  一種琯狀中柱，其中初生脈琯組織排列在髓孔周圍，存在於大多數種子植物中。
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• The thickened tap root appeared to consist of 2 or 3 rings of anomalous vascular bundles surrounding the central cylinder which might be an important adaption to dry condition.
  主根粗壯，其中柱周圍産生2或3輪呈同心環狀排列的異常維琯束。 這種異常結搆對旱生植物具有重要的生態學意義。
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