optional

常见例句

用作形容词 (adj.)

用作定语: ～+ n.

• Chinese is our optional course to us students of science.
  中文是我们这些理科学生的选修科目。
• We have some optional subjects.
  我们有一些选修科目。

用作表语: S+be+～

• The goods are optional, but only one.
  这些物品是可以任选的,但只能选一个。
• Our attendance at graduation is optional.
  毕业典礼可以自愿参加。

更多例句

• We also recommend a full day optional excursion to the Upper Douro.
  我们还推荐去杜罗河上游的短途自选一日游。
• The course consists of ten core modules and five optional modules.
  这门课程包括十个必修单元和五个选修单元。
• Certain courses are compulsory, others are optional.
  某些课程是必修的，其他是选修的。
• The course consists of ten core modules and five optional modules.
  这门课程包括十个必修单元和五个选修单元。
• Certain courses are compulsory, others are optional.
  某些课程是必修的，其他是选修的。
• 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。
• We also recommend a full day optional excursion to the Upper Douro.
  我们还推荐去杜罗河上游的短途自选一日游。
• Optional extras include cooking tuition at a top restaurant.
  可选的额外项目包括在顶级餐厅学习厨艺。
• The goods are optional, but only one.
  这些物品是可以任选的, 但只能选一个.
• It is optional with you.
  那是你的自由.
• Attendance at the lecture is optional.
  这一讲座可随意参加.
• Airfield: 4 Firehawks, which is enough to destroy an opposing Tech are optional.
  机场: 4个火鹰, 这足够您摧毁敌人得高科了,云层推进升级可选.
• Appends the specified element of List ( optional operation ).
  在列表尾部添加指定元素 ( 可选操作 ).
• The appearance of two new optional color effect: soil and grass green bronze.
  对于外观,有两种新的效果色可选: 土青铜色与草绿色.
• On lesser amounts, insurance is recommended but optional and taken out at your request.
  在少许数额, 保险被推荐但任意和被去掉根据您的请求.
• However, the alt attribute is optional and may be omitted from particular image elements.
  然而, alt的属性是可选的,甚至是可以忽略的.
• A general categorization ( optional ). Negative, epithelial cell abnormality, or other ( see interpretation below ).
  大体分类 ( 可选择项 ). 正常, 或上皮细胞异常, 或其他 ( 参看以下描述 )
• Constructors have optional extra parameters for the comparison object.
  构造函数有可选的额外参数用于比较用的函数对象.
• The optional wind deflector minimizes drafts and wind turbulence, eliminating wind chill and maximising comfort.
  作为备选设备的挡风板也以有效的防止气流干扰, 消除风冷,优化舒适度.
• Air pressure type cooling device are optional parts by customers.
  可依客户需求增设气冷式冷却设备.
• Black polyester paint; optional in other special paints on request.
  黑色聚脂漆; 按订货要求可选用其它专门的油漆.
• The cassette player is an optional extra in this make of car.
  这种型号汽车如需盒式磁带唱机费用另计.
• Automatic thread trimmer ( optional ), to increase sewing efficiency and reducing production cost.
  备有自动 切线 机型, 可增加缝制效率降低成本.
• There are a range of optional units available depending upon work role and work setting.
  有一系列的可选单元可根据工作的职责和工作设置而定.
• In this first form, the comma following the parameter declarations is optional.
  在第一种形式中, 形参声明后面的逗号是可选的.
• A variable automatic transmission , Mitsubishi's first , will be optional.
  同时也有一款无极变速器作为可选配置.
• Optional argument which specifies what target to build in the subproject.
  可选参数用来指定子项目将要构建什么目标.
• Checks authorization for the given operation context and optional message.
  检查给定操作上下文和可选消息的授权.
• Solid Stellite 6 wedge ( optional ) ensures low friction and long service life.
  实心钨铬钴合金6楔板 ( 选项 ) 确保较低的磨损和较长的使用寿命.
• This will inform him as to what is necessary and which parts are optional.
  这会给他指明什么是必须的,哪些部分是可选择的.
• The car radio is an optional extra.
  汽车上的收音机是可选择的额外配件.
• It's discussed as though it were an optional, quaint and largely irrelevant part of biology.
  这种讨论好象是可选择的 、 离奇的或与生物根本无关的事情.
• In other FIDIC documents, this was more of an optional provision.
  在其它的FIDIC合同文件中, 这是一个可选择的条款.
• The authentication phase of a PPP session is optional.
  点对点协定交谈的验证阶段是可选择的.
• An optional Fault element that provides information about errors that occurred while processing the message.
  处理信息时,提供关于产生错误信息的可选择的错误元素.
• A 4 th cashout request is optional. It costs $ 100 USD.
  第4个请款是可选择的.费用100刀.
• Contributions are purely optional.
  捐献完全是随意的.
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