劍橋詞典people who have the highest social position and are usually rich 上層社會(huì)的成員 Many treasures were brought back to Britain because its upper crust was wealthy and liked travelling abroad . 大量財(cái)寶被帶回英國(guó)，因?yàn)槟抢锏纳蠈由鐣?huì)成員很富有并且喜歡在外國(guó)游歷。 返回 the upper crust