valve
valve
noun
valved
adjective
adjective
语源
noun
- a device for controlling the passage of fluid through a pipe or duct, especially an automatic device allowing movement in one direction only
阀，活门，气门
■(Brit.). short for thermionic valve
(英)。 thermionic valve的简称
■(Music)a cylindrical mechanism in a brass instrument which, when depressed or turned, admits air into different sections of tubing and so extends the range of available notes
(乐)（铜管乐器）阀键
■(Anatomy & Zoology)a membranous fold in a hollow organ or tubular structure, such as a blood vessel or the digestive tract, which maintains the flow of the contents in one direction by closing in response to any pressure from reverse flow
(剖，动)瓣膜，瓣
■(Zoology)each of the halves of the hinged shell of a bivalve mollusc or brachiopod, or of the parts of the compound shell of a barnacle
(动)壳板
■(Botany)each of the halves or sections into which a dry fruit (especially a pod or capsule) dehisces
(植)瓣，瓣膜
valved
adjective
- [in combination]a branchiopod has a two-valved outer covering.
叶足动物有两片外壳。
adjective
语源
- late Middle English (denoting a leaf of a folding or double door): from Latin valva
热门查询
- laudatory adj.颂扬的
- laugh vi.笑,发笑,嘲笑,（特别表示因成功而）处于有利地位 vt.以笑表示，以笑感动[影响] n.笑,笑声,引人发笑的事或人,笑料
- laughable adj.有趣的，逗人笑的,好笑,可笑
- laughably adv.可笑，有趣
- laugher n.笑者，哄笑者，好笑的一边倒比赛
- laughing adj.笑的,笑柄,走运,决不是开玩笑的事 v.笑( laugh的现在分词 ),发笑,嘲笑,（特别表示因成功而）处于有利地位
- laughingly adv.笑着地，可笑地,笑哈哈
- laughingstock n.笑柄，受人嘲笑者,笑谈,笑料
- laughter n.笑，笑声,〈古〉好笑的事,〈美俚〉力量悬殊得可笑的体育比赛,大笑
- laughton n.（姓氏）劳顿
- laughy adj.想笑的，好笑的 n.闹剧
- laulau n.（夏威夷语）“捞捞”菜（一种把切碎的肉、鱼、芋叶等包在叶中蒸或烘熟的菜肴）
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