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sheath [ʃi:θ] 
词性及解释
  • n.
    鞘, 叶鞘, 翅鞘
  • 【化】
    护套
  • 【医】
词形变化
名词复数: sheaths 动词过去式: sheathed 过去分词: sheathed 现在分词: sheathing 第三人称单数: sheaths
英英解释
  • 1.
    n.a protective covering (as for a knife or sword)
  • 2.
    n.an enveloping structure or covering enclosing an animal or plant organ or part
    [同]case
常用词组
例句
  • 1.
    To destroy or remove the myelin sheath of(a nerve fiber,AS through diseASe.
    失去髓磷质(通过疾病等)破坏或移走(神经纤维)鞘中的髓磷质
  • 2.
    a protective covering, especially a sheath to enclose the base of a floor-mounted gear shift lever in a CAR or truck.
    一种防护性覆盖物,尤指小汽车或卡车内一种用于包住登板或排档杆基部的套子。
  • 3.
    The old man shivered in the cold that came after sunset. When something took one of HIS remaining baits, he cut the line with HIS sheath knife.
    日落之后,寒意袭人,老人冷得发抖。当他剩下的鱼饵中有一块被咬住时,他就用自己那把带鞘的刀把钓丝给割断了。
  • 4.
    To draw from or as IF from a sheath or scabbard.
    拔出从剑鞘或枪套中或仿佛从剑鞘或枪套中拔出
  • 5.
    Most axons In adult nerve tissue are ensheathed by sIngle or multiple folds of a sheath cell
    成年人神经组织的大多数轴突外面都包裹着一层或多层鞘细胞。
  • 6.
    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
  • 7.
    A benign cystic lesion resembling a tumor,occurring in a tendon sheath or joint capsule.
    腱鞘囊肿类似肿瘤的一种良性胞囊损伤,产生于腱鞘或联合囊内
  • 8.
    The sheath of connective tissue enclosing a bundle of nerve fibers
    经来膜包裹住神经纤维的膜状结缔组织
  • 9.
    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
  • 10.
    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)
词汇级别

小测验:选择正确的单词

sheath means:
  • A.vdariance
  • B.adrtistic handwriting
  • C.ydearning
  • D.cdase

浏览历史

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