optional
英 [ˈɒpʃənl]
美 [ˈɑːpʃənl]
adj. 可选择的; 选修的
高考CET4CET6考研TOEFLIELTSGRETEM4TEM8化学
Collins.1 / BNC.5815 / COCA.5692
牛津词典
adj.
- 可选择的;选修的
that you can choose to do or have if you want to
- Certain courses are compulsory, others are optional.
某些课程是必修的,其他是选修的。 - This model comes with a number of optional extras (= things you can choose to have but which you will have to pay extra for) .
这一型号有一系列可供选择的附件,价格另计。
柯林斯词典
- ADJ 可选择的;非强制的
If something is optional, you can choose whether or not you do it or have it.
- 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。 - Sex education is a sensitive area for some parents, and thus it should remain optional.
性教育对某些家长而言是个敏感领域,因此应该保持其非强制性。
双语例句
- 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。
- 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。
- 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。
- Sex education is a sensitive area for some parents, and thus it should remain optional.
性教育对某些家长而言是个敏感领域,因此应该保持其非强制性。
- We have some optional subjects.
我们有一些选修科目。
- 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。
- Our attendance at graduation is optional.
毕业典礼可以自愿参加。
- Return to the path including the optional mainframe and mail senders list.
返回路径中包括了可选的主机和发送者邮箱列表。
- The cycles are periodic and optional.
循环是阶段性和可选择的。
- FROM is an optional clause that provides the URI of the dataset to use.
作为前缀。FROM是一个可选的子句,它提供了将要使用的数据集的URI。
- Above the communication protocols are the optional file attachment and security layers that are implemented with MIME.
通信协议的上面是可选的文件附件和安全层,用MIME实现。
- This is in fact the solution to the original problem of the optional XML element!
这实际上解决了最初的可选XML元素的问题!
- The SOAP specification describes that a SOAP envelope can contain an optional header part.
SOAP规范描述了SOAP信封可以包括一个可选的消息头部分。
- Actions and predicate are optional.
动作和断言是可选的。
- This is an optional step.
这是一个可选的步骤。
- An activity can also have optional and required inputs and attributes, as defined by the activity's creator.
活动还可以拥有可选和必要输入和属性,这由活动创建者定义。
- The next block defines the concept f: product, specifying a preferred label as well as optional alternates.
下一个代码块定义了概念f:product,指定了需要的标签和可选的选项。
- A custom property has a name and an optional ( string) value.
一个自定义属性有一个名称和一个可选值(字符串)。
- This contains a list of mandatory and optional fields.
它包含一个强制性和非强制性命令的列表。
- Each accepts parameters for a key and a value, with the value being optional.
它们每一个都接受键和值的参数,值为可选。
- Each can have zero or more parts, and each part can have a name and an optional type.
每一个可以没有任何部分,或者有多个部分,每个部分都有一个名字和可选的类型。
- Note that both the dependencies and the instructions are optional; only the target and the colon are required.
请注意依赖性和指令都是可选的;只有目标和冒号才是必须的。
- The name value pairs for userName, passWord, and toc are optional.
passWord和toc的名称值对是可选的。
- This optional attribute specifies a list of manager IDs.
这个可选属性指定了一个管理器ID列表。
- The mistake is to consider this as an "optional" activity.
将其考虑为“可选的”活动就错了。
- The second and third arguments are optional.
第二和第三个参数是可选的。
- The square brackets ( [ and]) enclose optional parameters.
方括号([和])中的是可选参数。
- You pass the before method an optional symbol and a code block.
您向before方法传递一个可选的标志和一个代码块。
- Optional and named arguments can be used not only with methods but also with indexers and constructors.
可选参数和命名参数不仅可以用在方法调用中,还可以用在索引器和构造器中。
- The comma between the name and key is optional, you can use a space instead if you wish.
用户名和密匙之间的逗号是可选的,你可以使用一个空格代替如果你想的话。
英英释义
adj
- possible but not necessary