喜樂美語
  1. 1aC1/ˈduːəl/ · /ˈdjuːəl/雙重的

    Having two parts, or made to do two things at the same time.

    示範例句 · Example

    Sam has dual nationality — he is a citizen of Taiwan and Canada.

    逐字Sam 有雙重國籍——他是台灣和加拿大的公民。

    dual 的意思是「有兩個部分、或同時做兩件事」，例如 dual role（雙重身分）、dual nationality（雙重國籍）。重點是這兩個部分是「同一種東西的兩個」，例如兩個國籍、兩個用途。dual 幾乎都放在名詞前面（a dual role），不放在 be 後面。跟 double 容易搞混——dual 強調「兩種功能或身分」，double 常指「兩倍、成雙」。

    常見搭配

    • dual role/purpose/function

      雙重角色／用途／功能

      two jobs or uses at the same time

      The room has a dual function as a bedroom and a study.

    • dual nationality/citizenship

      雙重國籍

      being a citizen of two countries

      She has dual citizenship in Japan and Australia.

    • dual system

      雙軌制

      a plan or setup that has two parts working together

      The school uses a dual system of grades and comments.

    意思相近

    doubletwofoldtwin

    意思相反

    single

core核心畫面

Picture one thing carrying two of something at once — two parts, two roles, or two uses packed into a single body, like a driving-school car with a full set of controls on both the student's and the instructor's side.

可以想成一個東西身上同時裝了兩套：兩個部分、兩種身分、或兩種用途擠進同一個載體裡。像一輛駕訓車，學員座和教練座各有一副方向盤和煞車——同一台車，卻能兩邊各自操作。

容易混在一起的字在訂閱裡。容易混在一起的字需要訂閱帳號。

同家族的字

意思相近

doubletwofoldtwin

意思相反

single

原始詞典資料12 筆記錄

以下是外部詞典記錄的用法，摘錄並精簡格式，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。

dualadj/ˈd͡ʒuː.əl/

  • 1

    Characterized by having two (usually equivalent) components.

    • a dual-motor vehicle
  • 2

    Pertaining to two, pertaining to a pair of.

    • dual engine failure
    • dual citizenship
  • 3

    grammarhuman-scienceslinguisticsPertaining to a grammatical number in certain languages that refers to two of something, such as a pair of shoes.

    • Modern Arabic displays a dual number, as did Homeric Greek.
  • 4

    mathematicsnatural-sciencesphysical-sciencesExhibiting duality.

  • 5

    linear-algebramathematicssciencesBeing the space of all linear functionals of (some other space).

    • Accordingly, a hyperplane in the sample space is dual to a subspace in the variable space.
  • 6

    category-theorycomputingengineeringBeing the dual of some other category; containing the same objects but with source and target reversed for all morphisms.

    • Every category is dual to its own dual, so if a statement holds in all categories so does its dual.

dualnoun/ˈd͡ʒuː.əl/

  • 1

    Of an item that is one of a pair, the other item in the pair.

  • 2

    geometrymathematicssciencesOf 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. The icosahedron is the dual of the dodecahedron.
  • 3

    grammarhuman-scienceslinguisticsThe dual number.

  • 4

    mathematicssciencesOf 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

    governmenthobbieslifestyleA 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.
    • But Dave agreed to participate in the Bulgarian dual, and that trapped me into having to wrestle, too.

dualverb/ˈd͡ʒuː.əl/

  • 1

    To convert from single to dual; specifically, to convert a single-carriageway road to a dual carriageway.

    • 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.
    • The power generation and propulsion systems are dualled to accommodate component failure and maintain propulsion at reduced speed should any part of one system be lost.

摘錄自 英文維基詞典 English Wiktionary，已精簡格式；依 CC BY-SA 4.0 授權使用，改動後的內容同樣以此授權提供。