...初生维管系统； [gap=722]Key words: optical microscopy; soybean; seedlings; cotyledon node zone; primary vascular system; ...
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The spatial and temporal characteristics and the model of the ontogenesis of the primary vascular system recurs the systematic development.
该幼苗初生维管系统个体发育的时空性和模式是系统发育的再现。
参考来源 - 几种被子植物幼苗的结构、分化与演化From exteral appearance, the root crown develops from the Hypocotyl, while anatomically, it is consist of the Cotyledon Node Zone and Hypocotyl . The convertion of primary vascular system occurs in the Cotyledon Node Zone between root and stem.3.
2．从外部形态看蔷薇实生苗的根颈由幼苗的下胚轴发育而来；观察幼苗的解剖学结构，发现根颈由子叶节区和下胚轴组成，初生维管系统在根和茎之间的转变发生在胚轴上很短的子叶节区。
参考来源 - 月季砧木选育及实生砧根颈生长的调控·2,447,543篇论文数据，部分数据来源于NoteExpress
The anatomical structure of its primary vascular system was studied and its cotyledon node zone is longer than that of Ranonculaceae.
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。
After making an anatomic study on the primary vascular system of their seedlings based on the theory and method of cotyledon node zone.
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。
There isn't a single drug currently on the market that addresses how cancer cells break loose from a primary tumor and get into the vascular system, migrate out, and form a secondary tumor.
麻省理工学院生物与机械工程学塞西尔与艾达·格林（Cecil and Ida Green）杰出教授卡姆说，“市场上没有一种药能说明癌细胞如何挣脱原来的瘤、进入血管系统、迁出并形成继发瘤。
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