The present paper describes the discovering of the dam of zhengguo canal and discusses the layout of its main structure at the starting part according to archaeological data.
本文记述了秦郑国渠大坝的发现，并依据考古资料，论述了郑国渠渠首枢纽工程的布局，以及技术特点。
Finally, the structure and function of the alimentary canal and its significances in Panorpidae taxonomy are briefly discussed.
最后简要讨论了蝎蛉消化道的结构与功能，及其在蝎蛉科昆虫分类中的意义。
Finally, the structure and function of the alimentary canal and its significances in Panorpidae taxonomy are briefly discussed.
最后简要讨论了蝎蛉消化道的结构与功能，及其在蝎蛉科昆虫分类中的意义。
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