| 单词 | optional |
| 释义 | optional optional /ˈɒp.ʃən.əl/ aep /ˈɑːp-/ adjective ► B2 If something is optional, you can choose if you want to do it, pay it, buy it, etc.: » English is compulsory for all students, but art and music are optional.Thesaurus+: ↑Taking and choosingWord Builder:–Nouns: option–Adjectives: optional–Verbs: opt • • • Extra Examples:» Seat-belts are included as standard but electric windows are an optional extra.» My phone came with 20 optional ringtones.» Do come to the party - fancy dress is optional.» There are several optional tours, for which there will be a small charge.» The basic model is quite cheap, but there are a lot of optional extras. |
| 随便看 |
英语词典包含67674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。