Facies analysis of the Cavan limestone and associated rocks
卡文灰岩及其共生岩石的相分析
The Cavan County Museum says in medieval times , butter was a luxury product that was used to pay taxes and rents .
卡文郡博物馆表示，中世纪的时候，奶油是一种奢侈品，可以用来缴税和租赁。
cavan