as keen as mustard
US /æz kiːn æz ˈmʌstərd/
UK /æz kiːn æz ˈmʌstəd/
成語
非常熱心, 非常積極
very enthusiastic and eager
範例:
•
She's always as keen as mustard to learn new things.
她總是非常熱衷於學習新事物。
•
The new recruits were as keen as mustard on their first day.
新兵們第一天就非常積極。