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词汇 optional
释义

optional

adjective
/ˈɒpʃənl/
/ˈɑːpʃənl/
  1. that you can choose to do or have if you want to可选择的;选修的
    • Certain courses are compulsory; others are optional.有些课程是必修的,其他是选修的。
    • This model comes with a number of optional extras (= things you can choose to have but which you will have to pay extra for).这一型号有一系列可供选择的附件,价格另计。
    • These features can be offered as an optional part of the package.这些功能可以作为软件包的可选部分提供。
    Topics Educationb2
    Collocations Dictionaryverbs
    • be
    • make something
    adverb
    • entirely
    • purely
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