sheath

Sheath為英語名詞，發音英[ʃiːθ]/美[ʃiːθ]，指包裹物體的保護性結構。其核心含義包括兩類：實物覆蓋層（如刀鞘、電纜護套）和生物學結構（如植物葉鞘、神經髓鞘），亦指女性貼身緊身服飾。

該詞在不同領域構成專業術語。生物學中描述神經細胞的絕緣髓鞘（myelin sheath）或植物維管束鞘（bundle sheath cells）；工業領域涉及攝像機護套、醫療器械（trocar sheath）等防護功能；服裝領域特指正式場合的緊身連衣裙（sheath dress）。跨學科套用涵蓋醫學、植物學、材料科學等領域。

詞源可追溯至古英語sceath，原始日耳曼語詞根*skaithiz（意為“切分”），早期指由木板拼接的劍鞘結構。現代語義從實物包裹延伸至細胞學，如蛋白質層對神經元的保護作用，以及植物細胞中葉綠體的鞘狀組織。

基本介紹

• 外文名：sheath
• 詞性：名詞

單詞發音

英[ʃiːθ]美[ʃiːθ]

短語搭配

Sheath dress緊身連衣裙 ; 女緊身服 ; 緊身裙 ; 中文百科

myelin sheath[解剖]髓鞘 ; 神經毒物 ; 髓磷脂

marrow sheath髓鞘

camera sheath攝像機外套

sheath surface護套表面

trocar sheath外套管

multiple sheath多層護套

sheath cell鞘細胞

caped sheath披肩罩

雙語例句

Thechloroplastsofboththemesophyllandthebundlesheathcellscontainmanygrana.

束鞘細胞的葉綠體和葉肉細胞的葉綠體都含有許多基粒。

Itsresearchershaveturned themintoatypeofcellthat producestheinsulatingsheatharoundanervecell.

其研究人員已經把幹細胞變成了一種在神經細胞周圍產生絕緣護套的細胞。

Butfrequentlywhatweseearedisruptionsin thewaythataprotein,it’s likeaninsulationsheatharoundthenervecell,growsanddevelops.

但是，我們經常看到一種蛋白質的生長和發育的途徑被打斷，這種蛋白質就像一個神經細胞周圍絕緣護套。

• To draw from or as if from a sheath or scabbard. 拔出從劍鞘或槍套中或仿佛從劍鞘或槍套中拔出。
• Note: cable approx weight is PVC sheath cable weight. 注電纜近似重量為聚氯乙烯護套電纜重量。
• He pulled Goliath's sword from its sheath and cut off the giant's head. 他從劍鞘里拔出歌利亞的劍，把這個巨人的頭切了下來。
• Then the Lord spoke to the angel, and he put his sword back into its sheath. 耶和華吩咐使者，他就收刀入鞘。
• The injury is actually the swelling of the sheath within which the cord slides. 這中傷痛實際上是跟腱鞘腫大。
• Periodically measure insulation resistance, inspect motor sheath grounding. 定期測量絕緣電阻，檢查機殼接地情況。
• Sharp knife sheath to protect themselves, it is satisfied with its dull. — Tagore. 刀鞘保護刀的鋒利，它自己則滿足於它的遲鈍。——泰戈爾。
• Our technique is done under direct visualization and trocar sheath in its position. 我們的技術是直接可視化及套管針鞘的位置。
• And the LORD commanded the angel; and he put up his sword again into the sheath thereof. 耶和華吩咐使者，他就收刀入鞘
• Some even have valuable objects like diamonds or agates on the handle or the sheath. 一些更有有價值目的象鑽石或者瑙在柄或者護套上一樣。
• A benign cystic lesion resembling a tumor, occurring in a tendon sheath or joint capsule. 鞘囊腫類似腫瘤的一種良性胞囊損傷，產生於鞘或聯合囊內。
• Don't use a dollar store extension cord with a flimsy, thin rubber sheath to get power to your HDTV. 不要用從一元店買來的橡膠層又輕又薄的延長電纜去給你的高畫質電視供電。
• One day after a trip to a faraway town, he handed me a knife and sheath, saying, “These are for you. 一天，他從一個遠方小鎮回來，遞給我一把刀，“給你的。
• Intrinsic safety type control cable with PE insulation, PVC sheath, Individual and General shielding. 聚乙烯絕緣，聚氯乙烯護套，分禁止和總禁止本安型控制電纜。
• Only a lot of American women silently thinking about where they might find a simple, pale sheath dress. 只是這樣一來又有不知多少美國婦女在暗自思量，要上哪才能找到一件簡潔素雅的連衣裙了。
• Its researchers have turned them into a type of cell that produces the insulating sheath around a nerve cell. 其研究人員已經把幹細胞變成了一種在神經細胞周圍產生絕緣護套的細胞。
• Finally, remember myelination, where you sort of get this fatty sheath over your neuron to make it more effective? 最後,回想一下髓鞘的形成,你會在哪裡長出脂肪鞘,去包裹神經元,使得神經元更有效率
• That all flesh may know that I the LORD have drawn forth my sword out of his sheath: it shall not return any more. 一切有血氣的就知道我耶和華已經拔刀出鞘，必不再入鞘。
• Each is a transparent sheath of plastic 17-metres long, mostly underwater, held in place by a floating collar. 每個都是17米長的塑膠套子，大部分淹沒於水下，由一個浮動的環狀裝置固定住。
• The cables provided with different outer sheath can't be tied together, if caused damage of other outer sheath. 假如其它外護套破損，則不同外護套的電纜不能綑紮在一起。
• The sheath prevents horrible things (badlynamed constants, incorrect types, etc.) in their code from infecting your code. Sheath可以阻止他們代碼感染你們代碼這種可怕的事發生（像差勁命名常量，錯誤類型之類）。
• Whenever there's a Nick or hairline crack in an insulation sheath, the electrical field in the underlying copper subtly shifts. 在絕緣套上只要出現缺口或者毛細裂縫，線纜里的銅周圍的電場就會輕微改變。