motherlode

剑桥词典

geology   specialized
a place that has very large supplies of a mineral or other natural resource
主矿脉；矿产和其他自然丰富的地区
The Pacific Northwest has been the motherlode of the nation's aluminum output for 60 years . 太平洋西北60多年来一直是这个国家铝矿的主产地。
Cairn Energy recently struck the motherlode of oil fields in India . 卡恩能源最近在印度的油田找到了产油层。

something that supplies a very large amount of a thing, quality , etc. that you want
主产区；主要供应来源
The flight data recorder had documented about 200 pieces of information , a motherlode for crash investigators . 飞行记录仪存贮了200条信息，是飞行事故调查员的主要信息来源。
With this market , vintage clothes shoppers have hit the motherlode. 有了这个市场，买旧款服装的人算是找到了好地方。 返回 motherlode