英语词汇“optional”的读音、翻译、释义、用法及例句-语文网

词汇	optional
释义	optional KK:[`ɑpʃәnḷ] DJ:[`ɔpʃәnәl] adj. 1. 随意的; 非必须的 n. 1. 选修科目同义: adj.自愿的, 志愿的 voluntary elective 反义: adj.随意的; 选修的 compulsory 反义参见: required
随便看	altercation altered check alter ego altering alter mode alternant alternate alternate buffering alternate CPU recovery alternate index alternate-index entry alternate key alternately alternate order alternate path retry alternate recovery alternate route alternate track alternate triples alternating current alternating current alternating operating systems moveable move about move along

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