Unfrequent
a. 不常发生的,不常见的
✅ 同义词
🗣️ 情景例句
I ventured to correct the teacher's mistake.
我鼓起勇气去纠正老师的错误。
The plans are not even made yet.
这计划还不曾有人策划过。
Fasten your seat belt.
系好你的安全带。