植物离体器官发生不仅是获得大量无性繁殖植物和进行基因转化的重要途径，而且亦是研究植物发育问题的主要实验系统之一。
Plant organ regeneration has an important role in plant reproduction and genetic engineering, and also provides an experimental system to study molecular mechanism of plant development.
这些毛蚴进体螺体，繁殖和发育对人类有传染性的尾蚴。
These organisms penetrate into snails, multiply, and develop into cercariae, the infective form for man.
这些毛蚴进体螺体，繁殖和发育对人类有传染性的尾蚴。
These organisms penetrate into snails, multiply, and develop into cercariae, the infective form for man.
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