单词
optional
读音
ˈɑːpʃənl
美式
英式
词根
Optional 这个单词来源于拉丁词根 "opt-", 意味着“选择”。其他由该词根衍生的单词有：opt (选择)、optimal (最理想的)，等等。
释义
adj. 可选择的，随意的
例句
Certain courses are compulsory, others are optional.
某些课程是必修的，其他是选修的。
Optional extras include cooking classes at a top restaurant.
可选的额外之物包括一家高级餐馆的烹饪课程。
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。
Optional extras include cooking classes at a top restaurant.
可选的额外之物包括一家高级餐馆的烹饪课程。
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。
强化记忆
你可以将 "optional" 这个词和 "option"（选项）联想在一起，记忆它的含义是“可选择的”。Optional 初始应用在法律语境中，后来扩大到更多的领域，以表达选择性、非强制性的含义。
看视频学发音
they are not destiny.They're optional.The danger is still kind of distant.
Christopher set up one-hour appointments,coffee optional,for his team members to have no agenda but to get to know their HR system.
will make decarbonizing fossil fuels harder,they don't make it optional.Global warming won't wait for the fossil fuel industry to die.
I mean, one is,fitness is no longer optional. (Laughter)You know? Or if you're going to be naked, you'd better get buff.
We pick up hobbies we do not enjoy.We restate our directives as optional suggestions.We talk about the weather instead of police brutality.
所属分类
高中,专升本-自考,程序员,其他
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