Collins Chinese Dictionary Plus (3rd edition), 2011:
premium [ˈpriːmɪəm]
I n
[c]
1 (Comm) (=additional sum) 额(額)外费(費)用 éwài fèiyòng [笔 bǐ]
2 (Insurance) 保险(險)费(費) bǎoxiǎnfèi
II adj
(also: premium-quality) [+ product, service] 质(質)量一流的 zhìliàng yīliú de
- to be at a premium
(=expensive) 稀有而昂贵(貴)的 xīyǒu ér ángguì de (=hard to get) 稀缺的 xīquē de