基本解释[地球科学]矿脉顶英汉例句双语例句I cleaned the car by hand for the first time in years, then found a mother lode of black beans in the back of the cupboard.几年来，我第一次自己动手清洗汽车，而后又在橱柜背后发现许多豆豉。back of lode更多例句专业释义地球科学矿脉顶