"mother lode" in Chinese (Simplified)
主矿脉最大来源
Definition
某事物的最主要或最丰富的来源；最初指矿井中最大的金银矿脉，如今用于指任何重要的价值或供应来源。
Usage Notes (Chinese (Simplified))
现代主要是比喻用法，通常用“of”引导说明是什么来源，例如“the mother lode of ideas”。最初为采矿术语，如今指任何大量、有价值的来源。
Examples
They discovered the mother lode of gold deep in the mountain.
他们在山里深处发现了金子的**主矿脉**。
That library is the mother lode of historical documents.
那个图书馆是历史文献的**最大来源**。
We hit the mother lode with our new app—so many downloads!
我们的新应用迎来了**主矿脉**，下载量非常大！
When she searched online, she found the mother lode of recipes for chocolate cake.
她在网上一搜，就发现了巧克力蛋糕的**主矿脉**配方。
This archive is the mother lode if you want rare photographs.
如果你想要稀有照片，这个档案馆是**主矿脉**。
We thought we'd just find a few old toys, but the attic was a real mother lode!
我们以为只会找到几件旧玩具，没想到阁楼是个真正的**主矿脉**！