| 释义 |
B2If something is optional, you canchooseif youwantto do it,payit,buyit, etc.: 可选择的；非强制的 Englishiscompulsoryfor allstudents, butartandmusicare optional.英语是所有学生的必修课，而艺术和音乐则是选修的。 Oppositescompulsory mandatoryformal obligatory - Seat-belts areincludedasstandardbutelectricwindowsare an optionalextra.
- Myphonecame with 20 optionalringtones.
- Do come to theparty-fancydressis optional.
- There are several optionaltours, for which there will be asmallcharge.
- Thebasicmodelisquitecheap, but there are a lot of optionalextras.
SMART Vocabulary: related words and phrasesTaking and choosing - adopt
- adopted
- adoption
- appoint
- bags I...idiom
- either-or
- elect
- empanel
- faute de mieux
- favoured
- go forsomeone
- picker
- plump
- select
- selection
- selective
- selectively
- selectivity
- selector
- skim
See more results » optional| American Dictionarynotnecessaryordemandedbutpossibleoravailable;dependingon what youdecideto do: Ithinkmilitaryserviceshould becompletelyoptional. optional| Business EnglishCOMMERCEsomething that is optional is something that you canbuyor do if youwantto, but that you do not have tobuyor do: Optionalplug-inscostafurther$50 onaverage. optionalaccessories/components optional extra COMMERCE,MARKETINGsomething that can beadded, atextracost, to abasicproductorserviceto make it moreattractive,efficient, etc.: Somecarmanufacturersofferadvancedstereosystemsas an optionalextraontheirmoreexpensivemodels. Examplesofoptionaloptional We show how to extend any existing parser combinator library with support for parsing permutations of typed, potentiallyoptionalelements.From theCambridge 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).From theCambridge English Corpus Take is usually a transitive verb, yet although it has an obligatory direct-object argument, locative arguments are normallyoptional.From theCambridge English Corpus For these children, then, we have no reason to suspect that agreement was anoptionalelement in the children's grammars.From theCambridge English Corpus The only exceptions are found at the word-level, whereoptionalrule application can be systematic in certain grammars.From theCambridge English Corpus In section 3.2, we develop an implementation for permutations withoutoptionalelements, and in section 3.3 extend this solution to cover optionality.From theCambridge English Corpus A postgraduate diploma option can be obtained after completion of the core andoptionalmodules or a master's degree after an additional research project dissertation.From theCambridge English Corpus Two further modules have to be chosen from the followingoptionalmodules: advanced statistical methods, clinical trials, qualitative research methods, and advanced health economics.From theCambridge English Corpus Up until 1945, theoptionalreferendum represented an efficient veto point for groups opposing the welfare state to dilute state-interventionist social policies.From theCambridge English Corpus This was accomplished by definingoptionalmatrix columns.From theCambridge English Corpus These devices can be combined withoptionalclausestructure variations, which reflect the fact that word order also encodes discourse status.From theCambridge English Corpus Evidently, an interpretation of a derivation is determined by its action on theoptionalaxioms.From theCambridge English Corpus The items below are presented asoptionalways of writing the same word or expression, some with the apostrophe/stop, others without.From theCambridge English Corpus For example, there are positions in which complementizers are obligatory,optionalor impossible, and these positions vary across languages and times.From theCambridge English Corpus The underlying dynamics of sibling relationships have been identified as balanced reciprocity,optionalrather than obligatory exchange of support and the maintenance of personal autonomy.From theCambridge English Corpus These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |