at a premium
成語所屬單字premium
at a premium — 慣用語
1. Something is hard to get because there is not enough of it.
1.慣用語
釋義
稀缺；供不應求
Something is hard to get because there is not enough of it.
例句
Parking spaces are at a premium in this crowded city.
Why is fresh water at a premium during the dry season?