Mother lode

（重定向自Motherlode）

Two water-worn gold nuggets from Tuolumne County. They are typical of larger nuggets found by the early California gold rush placer miners (each ~1.6 x 1.1 x 0.3 cm).

Crystalline gold specimen from the California Mother Lode, probably from Tuolumne County (5.3 x 2.7 x 2.4 cm).

Mother lode is a principal vein or zone of veins of gold or silver ore. The term is also used metaphorically to refer to the origin of something valuable or in great abundance.

单词	Motherlode
释义	Motherlode 原声例句云游手册 The Frenchman never did hit the motherlode, but instead discovered one of Death Valley’s greatest treasures, serenity. 这位法国人从未真正触及矿脉，而是发现了死亡谷最宝贵的财富之一——宁静。心理学 Crash Course Which brings us back to that biggest motherlode question of them all: Who, or what, is the self? 这让我们回到了他们所有人中最大的母体问题：谁，或者什么，自我？英语百科 Mother lode （重定向自Motherlode） Mother lode is a principal vein or zone of veins of gold or silver ore. The term is also used metaphorically to refer to the origin of something valuable or in great abundance.
随便看	cost of materials consumed cost of medicines cost of merchandise sold cost of mining cost of mobility Cost of money cost of money capital cost of mounting cost of natural resources employed cost of natural selection cost of needed auxiliaries and access ories cost of new fixed assets cost of observation cost of obtaining evidence cost of operating Cost of operation cost of organization cost of original production cost of other operating revenues cost of overhaul cost of overstock and stockpile items Cost of ownership cost of owning cost of packaging and advertising cost of parts used