英语词汇“optional”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-新都网

单词	optional
释义	optional —optionality, n. —optionally, adv. /op"sheuh nl/, adj. 1. left to one's choice; not required or mandatory: Formal dress is optional. 2. leaving something to choice. [1755-65; OPTION + -AL¹] Syn. 1. discretional, elective, voluntary.
随便看	French Cameroons French Canadian French chalk French chop French colombard French Community French Congo French cruller French cuff French curve French-cut French dip French door French drain French dressing French endive French Equatorial Africa French flat French foot French fries French-fry French Guiana French Guinea French harp French heel

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