operative/ˈɑː.pɚ.ə.t̬ɪv/形容词有效的；实施中的；使用中的The agreement will not become operative until all members have signed.所有的成员都签字后协议才会生效。和手术有关的an operative technique手术技术/ˈɑː.pɚ.ə.t̬ɪv/名词工人；（尤指）技工a CIA operative中央情报局特工想跟读，去练习
