| 单词 | optional |
| 释义 | optional adjectiveverbs | adverb verbs➤be可选择▸➤make sth使⋯成为可选adverb➤entirely, purely完全自由选择的◆the extra language classes are entirely optional.附加的语言课程是自由选修课。 optional /ɒpʃənl; name ɑːp-/ adjectivethat you can choose to do or have if you want to 可选择的；选修的◆you must wear a shirt and tie, but jackets are optional. 你们必须穿衬衫、系领带，但是否穿夹克衫则自便。◆this model comes with a number of optional extras (= things you can choose to have but which you will have to pay extra for). 这种型号有多种配件可供选购。☞ optionaloptionalthat you can choose to do or have if you want to可选择的；选修的◆certain classes are compulsory, others are optional.某些课程是必修的，其他是选修的。◆ (bre) this model comes with a number of optional extras (= things you can choose to have but which you pay extra for).这种型号有一些可供选择的附件，但要额外收费。opp compulsory , obligatory → necessary ➡ see also option → option note 辨析 voluntary or optional? voluntary puts the emphasis on choosing to do or have sth without being forced to because of a rule or law; optional puts the emphasis on sth being available for you to choose if you want, when it is sth extra, not an essential part of sth. * voluntary 强调自己选择做某事或拥有某物而非因规章或法律而被迫去做； optional 强调某物是额外提供以备选的，不是必不可少的部份。optional/ˈɒpʃənl ||; ˈɑpʃənḷ/adj that you can choose or not choose 可选择的；非强制性的: ◇an optional subject at school 学校里的选修科目 [opp] compulsory or obligatory 反义词为compulsory或obligatoryoptionalsee ⇨ must/don't have to 5 op·tion·al /`ɑpʃənḷ; ˈɒpʃənəl/adjif 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 |
|
英汉双解词典收录171353条英汉汉英双解翻译词条，基本涵盖了全部常用单词的读音、翻译及用法，是英语学习的有利工具。