proof-BNC²³⁶²¹³⁺¹ 基本例句 stem.验证Validation试验testing证实Confirmed批准approved相关词根prob-;prov- The federal government in Washington, DC, returns$13.25 of every$13.50 it collects per proof- gallon of rum to Puerto Rico and the USVI. 目前，华盛顿特区的联邦政府从每标准加仑征收的13.50美元中返回13.25美元给波多黎各和美属维京。 ecocn