treasure trove
noun uk/ˈtreʒ.ə ˌtrəʊv/ us/ˈtreʒ.ɚ ˌtroʊv/
a treasure trove of something 丰富的…，…的宝库
a place that is full of something good
a treasure trove of information 丰富的信息
Though small, this museum is a veritable treasure trove of history. 尽管这个博物馆很小，却也是大量史实资料的宝库。
[ C or U ] UK无主宝藏；无主珍宝
a large amount of money or a large number of valuable objects found hidden somewhere and seeming to belong to no one
A Roman soldier's pay, found by a metal detector enthusiast in Norfolk, has been declared treasure trove. 一个金属探测爱好者在诺福克郡发现了一枚古罗马士兵的薪金币，经过鉴定被宣布为无主珍宝。