optional
形容詞
UK/ˈɒp.ʃᵊn.ᵊl/
US/ˈɑːp.ʃᵊn.ᵊl/
定義 optional 形容詞
- B2
Something that is optional is not required; it is available to be chosen but not mandatory.
可选择的；非强制性的
Attendance at the seminar is optional, but your participation is strongly encouraged.
参加研讨会是可选的，但我们强烈鼓励您参与。
The software update is optional, but it does include some bug fixes.
软件更新是可选的，但它确实包含了一些错误修复。
Our company offers an optional dental insurance plan.
我们公司提供可选的牙科保险计划。