operative

operative
adjective
  1. functioning; having effect
    运行的；有效的
    the transmitter is operative.
    发报机正在运作。
    the mining ban would remain operative.
    采矿禁令将继续有效。
    ■[attrib.](of a word) having the most relevance or significance in a phrase or sentence
    （词在词组或句子中）最重要的
    I was madly—the operative word—in love.
    我当时疯狂 地——关键词是——陷入了恋爱之中。
  2. [attrib.]of or relating to surgery
    手术的
    they had wounds needing operative treatment.
    他们受的伤需要手术治疗。
noun
  1. a worker, especially a skilled one in a manufacturing industry
    （尤指制造业中的）技术工
    ■a private detective or secret agent
    私人侦探
派生
operatively
adverb
operativeness
noun
语源
  1. late Middle English: from late Latin operativus, from Latin operat- 'done by labour', from the verb operari (see operate)
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