dual

名词 n. 动词 v. 形容词 adj.
中文释义
美 /ˈdul/|/ˈd(j)u.əl/

英文释义

名词 n.
  1. Of an item that is one of a pair, the other item in the pair.
  2. Of a regular polyhedron with V vertices and F faces, the regular polyhedron having F vertices and V faces.
    — The octahedron is the dual of the cube.
  3. The dual number.
  4. Of a vector in an inner product space, the linear functional corresponding to taking the inner product with that vector. The set of all duals is a vector space called the dual space.
  5. A head-to-head match or meet between two teams, such as two high schools or colleges.
    — Wrestling duals and meets take place at the Wisconsin Field House. There are no advance single event ticket sales.
动词 v.
  1. To convert from single to dual; specifically, to convert a single-carriageway road to a dual carriageway. transitive
    — I have to declare an interest and I do so with some ambivalence because if the road is dualled it is likely to take half of my front garden.
形容词 adj.
  1. Characterized by having two (usually equivalent) components. not-comparable
    — a dual-motor vehicle
  2. Pertaining to two, pertaining to a pair of. not-comparable
    — dual engine failure
  3. Pertaining to a grammatical number in certain languages that refers to two of something, such as a pair of shoes. not-comparable
    — Modern Arabic displays a dual number, as did Homeric Greek.
  4. Exhibiting duality. not-comparable
  5. Being the space of all linear functionals of (some other space). not-comparable
    — Accordingly, a hyperplane in the sample space is dual to a subspace in the variable space.
  6. Being the dual of some other category; containing the same objects but with source and target reversed for all morphisms. not-comparable
    — Every category is dual to its own dual, so if a statement holds in all categories so does its dual.

词形变化

du. alternative,abbreviation duals plural du. alternative,abbreviation duals present,singular,third-person dualing US,participle,present dualling UK,participle,present dualed US,participle,past dualed US,past dualled UK,participle,past dualled UK,past du. alternative,abbreviation

词汇关系

近义词
binary double dual twin twofold
上位词
plural
下位词
bipartite dimerous duplex dyadic bipartible bipartile
衍生词
bidual codual coduality dual audio dual-band dual boot dual-boot dual-braked dual cab dual-capable aircraft dual career couple dual citizen dual citizenship dual-clutch gearbox dual-coding theory dual control dual degree dual earner dual earner couple dual earner family dual economy dual-edged sword dual-energy X-ray absorptiometry dual-exceptional dual federalism dual-frequency dual graph dual heritage dual house dualic dualie dualisation dualism dualist dualistic duality dualization dualize dual-lens reflex dually dual mandate dual meet dual mode dual-mode dual monastery dual nationality dual offence dual phenomenology dual photon absorptiometry dual polyhedron dual-ported dual primary dual-purpose dual resident dual school dual-sector model dual sensory impaired dual-SIM dual SIM dualski dual tone multi-frequency dual-tropic dual-use dual-use research of concern dual-voltage dual wield duloxetine Hodge dual isodual nondual non-self-dual predual pseudodual categorical dual first-person dual second-person dual self-dual third-person dual
相关词
unal duel

词源

词源 1
PIE word
*dwóh₁
Borrowed from Latin dualis (“two”), from duo (“two”) + adjective suffix -alis.
词源 2
PIE word
*dwóh₁
Borrowed from Latin dualis (“two”), from duo (“two”) + adjective suffix -alis.
词源 3
PIE word
*dwóh₁
Borrowed from Latin dualis (“two”), from duo (“two”) + adjective suffix -alis.
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