as keen as mustard
US /æz kiːn æz ˈmʌstərd/
UK /æz kiːn æz ˈmʌstəd/
成语
非常热心, 非常积极
very enthusiastic and eager
示例:
•
She's always as keen as mustard to learn new things.
她总是非常热衷于学习新事物。
•
The new recruits were as keen as mustard on their first day.
新兵们第一天就非常积极。