optional 在英语-中文（简体）词典中的翻译
optionaladjective uk
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/ˈɒp.ʃən.əl/ us
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/ˈɑːp.ʃən.əl/
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B2 If something is optional, you can choose if you want to do it, pay it, buy it, etc.
可选择的;非强制的
English is compulsory for all students, but art and music are optional.
英语是所有学生的必修课，而艺术和音乐则是选修的。
反义词
compulsory
mandatory formal
obligatory
更多范例减少例句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.
(optional在剑桥英语-中文（简体）词典的翻译 © Cambridge University Press)
optional的例句
optional
The underlying dynamics of sibling relationships have been identified as balanced reciprocity, optional rather than obligatory exchange of support and the maintenance of personal autonomy.
来自 Cambridge English Corpus
The final (optional) element of the sequence gives the values of the syntactic functions, adjuncts and specifiers (in any order, distinguished by their role names).
来自 Cambridge English Corpus
The items below are presented as optional ways of writing the same word or expression, some with the apostrophe/stop, others without.
来自 Cambridge English Corpus
These devices can be combined with optional clausestructure variations, which reflect the fact that word order also encodes discourse status.
来自 Cambridge English Corpus
In section 3.2, we develop an implementation for permutations without optional elements, and in section 3.3 extend this solution to cover optionality.
来自 Cambridge English Corpus
The most plausible explanation for the constitutional concern with rules is that most states of affairs are constitutionally optional-neither forbidden nor mandated.
来自 Cambridge English Corpus
For example, there are positions in which complementizers are obligatory, optional or impossible, and these positions vary across languages and times.
来自 Cambridge English Corpus
We show how to extend any existing parser combinator library with support for parsing permutations of typed, potentially optional elements.
来自 Cambridge English Corpus
示例中的观点不代表剑桥词典编辑、剑桥大学出版社和其许可证颁发者的观点。
B2