2．平行脉（parallel veins） 侧脉与中脉平行达叶尖或自 中脉分出走向叶缘而没有明显的小脉连结，绝大多数单子叶 植物的脉序属此种类型。
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With Parallel Veins 具平行脉
straight parallel veins 直出平行脉
parallel veins mechanisms 平行四边形机构
Parallel Veins Not Obvious 平行脉不明显
long wise dispatch parallel veins 纵出平行叶脉
Parallel Secondary Veins 平行次脉
·2,447,543篇论文数据，部分数据来源于NoteExpress
It is a cancer of the lymphatic system, which is a part of the immune system that consists of a series of ducts or tubes that parallel the arteries and veins throughout the body.
CNN: What is Hodgkin lymphoma's effect on the lymphatic system?
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