其初生维管系统的解剖学研究表明：子叶节区明显长于毛茛科植物幼苗，属顶枝伸长型。
The anatomical structure of its primary vascular system was studied and its cotyledon node zone is longer than that of Ranonculaceae.
根据子叶节区理论和方法对胡萝卜幼苗初生维管系统进行了解剖学研究。
After making an anatomic study on the primary vascular system of their seedlings based on the theory and method of cotyledon node zone.
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