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  •   你查询的单词是:sheath ([ ʃi:θ ]
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  •   解释: n. 鞘,叶鞘,翅鞘
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  •   例子: 1. 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
    2. 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)
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