optional 详细解释

optional

['ɔpʃənl]

adj.任选的

词形变化

副词: optionally |

词义辨析

同义:

a.自愿的, 志愿的

voluntary  elective  

反义:

a.随意的; 选修的

compulsory  

反义参见:

required  

英英释义

形容词 optional:

possible but not necessary; left to personal choice

补充

optionaloptional英:[ˈɔpʃənl] 美:[ˈɑpʃənəl]adj.1.可选择的, 非强制的The goods are optional, but only one.这些物品是可以任选的, 但只能选一个。

例句

1. French is optional at this school.在这所学校, 法语是选修课。 2. a comprehensive range of optional accessories种类丰富的可选配件 3. The car comes with many optional extras such as radio and cigarette lighter.这辆汽车配有很多可选附件, 比如收音机和点烟器等。 4. A holiday isn't an optional extra. In this stressful, frantic world it's a must.休假并非可有可无。在这个紧张而忙碌的世界, 它是必不可少的。 5. a wide range of optional excursions is offered.有众多旅游项目供选择。 6. an optional subject at school学校里的选修科目 7. "Jackets are required at the restaurant, but ties are optional."这家饭店要求必须穿夹克式外套，但领带不是必需的。 8. Many optional features are available on this car.这款汽车提供了很多可选择的功能。 9. "Registration is optional, not mandatory."注册是可选的，不是强制的。

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