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optional

听听怎么读
英 [ˈɒpʃənl]
美 [ˈɑpʃənl]
是什么意思
  • adj.

    可选择的;随意的,任意的;非强制的;选修科目

  • 双语释义

    adj.(形容词)
    1. 可选择的,非强制的 which may be freely chosen or not chosen

    英英释义

    optional

    • adj.possible but not necessary; left to personal choice
    学习怎么用

    词汇搭配

    用作形容词 (adj.)
    ~+名词
    • optional course〔subject〕选修科目

    词组短语

    optional course选修课,选修课程

    optional parameter任选参数,可选参数

    optional exercise自选动作

    optional equipment【计】附加设备;任选设备

    optional item可选择项目

    双语例句

    用作形容词(adj.)
    1. The insurance cover is optional.
      保险范围可以随意选择。
    2. It is optional with you.
      那是你的自由。
    3. The goods are optional, but only one.
      这些物品是可以任选的, 但只能选一个。
    4. A 4-speed automatic transmission is optional.
      四段自动变速器是可自由选择的。

    权威例句

    JADE: Adaptive Differential Evolution With Optional External Archive
    ...Anonymous Credentials with Optional Anonymity ...
    JADE: adaptive differential evolution with optional external archive
    An Ecient System for Non-transferable Anonymous Credentials with Optional Anonymity Revocation
    Evidence supports optional use of RAI for papillary thyroid cancer
    Specific language impairment as a period of extended optional infinitive.
    Voltage Security Assessment Using Generaized Optional Planning Knowledge
    The English Education System at National Institute of Technology, Kisarazu College : The Introduction of "Optional or Voluntary Acti...
    Application of a New Teaching Method in Optional Courses
    Evaluation of optional fee structures for solid waste management in China