n.
1.(刀、剑或工具尖锐部分的)鞘、套
2.(男用)避孕套
3.(植物或动物器官的)鞘状(包覆物)
4.外层覆盖(物),外包物
1.(刀、剑或工具尖锐部分的)鞘、套
2.(男用)避孕套
3.(植物或动物器官的)鞘状(包覆物)
4.外层覆盖(物),外包物
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- A sheath formed at the node of a stem by the fusion of two stipules,as in the rhubarb plant.
托叶鞘两片托叶接合于枝干的结上而形成的一种鞘,如在大黄属植物中。收藏 - Lacking a myelin sheath.Used of a nerve fiber.
缺少髓鞘的。用来指一根神径纤维收藏 - One class of encephalitis (including multiple sclerosis) attacks the myelin sheath that insulates nerve fibres rather than the neurons themselves.
传染性脑炎最常见的病原为病毒。其中之一(包括多发性硬化)会攻击髓鞘,隔绝了神经纤维而非神经元。收藏 - A tag or metal sheath on the end of a lace,cord,or ribbon to facilitate its passing through eyelet holes.
金属小箍鞋带或其它绳带两端的金属箍,使鞋带能容易地穿过网眼收藏 - The innermost layer of the cortex that forms a sheath around the vascular tissue of roots and some stems.
内皮层皮层的最内层,在根、茎的导管组织周围形成一道叶鞘(茎衣)收藏
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