optional
01
可选的, 非强制的
available or possible to choose but not required or forced
例子
The final project is optional, but many students choose to complete it for extra credit.
最终项目是可选的，但许多学生选择完成它以获得额外学分。
Attendance at the seminar is optional; students can attend if they are interested in the topic.
研讨会的出席是可选的；如果学生对主题感兴趣，可以参加。
Optional
01
可选的, 非强制性的
something that is not required or mandatory, especially in an academic setting
例子
The university offers a variety of electives, allowing students to choose from a range of optionals to tailor their education.
大学提供各种选修课，允许学生从一系列可选课程中选择以定制他们的教育。
At the conference, attendees can select from a menu of workshops, with each workshop being an optional.
在会议上，与会者可以从一系列研讨会中选择，每个研讨会都是可选的。
词汇树
optionally
optional
option
opt
