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

单词	optional
释义	Optional adjadj.allpossible but not necessary; left to personal choice Antonyms:obligatory Inherited Hypernyms:optional Similar to:elective facultative ex gratia nonmandatory nonobligatory
随便看	ancient ancient greek ancient history anciently ancientness ancient pine ancients ancillary ancistrodon ancohuma anconeous muscle ancylidae ancylose ancylostomatidae ancylus ancylus fluviatilis andalucia andalusia andalusian andaman marble andaman redwood andaman sea andante andantino and circuit

英语词典包含147479条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。