英语词汇“optional”的读音、翻译、释义、用法及例句-留学网

词汇	optional
释义	op·tion·al /`ɑpʃənḷ; ˈɒpʃənəl/ adj if something is optional, you can choose to have it or do it, but do not have to 可选择的，非强制的: The sunroof is optional. 车顶天窗是可供选择的额外配置。
随便看	alternativities alternativity alters altho although although altitude altitudes altitudinal altitudinous alto altogether altogether altogetherness altogethers altos alto's altruism altruisms altruistic altruistically altruists aluminium aluminiums aluminum

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