cornucopia
/ˌkɔ:njuˈkəupɪə; ˌkɔrnjə`kopɪə/ n
1 (also horn of plenty) ornamental animal's horn shown in art as overflowing with flowers, fruit and corn, symbolizing abundance 丰饶角（艺术作品中象徵丰饶的羊角, 角内呈现满溢的鲜花、 水果及谷物）.
2 (fml fig 文, 比喻) abundant source 富饶之源; 宝藏
The book is a cornucopia of information. 书是知识的宝库.