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 adj. being an option only; not obligatory. Derivatives optionality n. optionally adv.
随便看	Yorkshire terrier Yoruba you you'd you'll young youngster younker your you're yours yourself youth youthful you've yowl yo-yo yr. yrs. ytterbium yttrium yuan yucca yuck yucky

英语词典包含43808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。