想象一下，有个淘金者，在矿山中很努力地工作，但只是发现他挖出的矿石都是毫无价值的。
Imagine a gold digger who has made considerable efforts in a mine, only to find that the mine ore is worthless.
想象一下，有个淘金者，在矿山中很努力地工作，但只是发现他挖出的矿石都是毫无价值的。
Imagine a gold digger who has made considerable efforts in a mine, only to find that the mine ore is worthless.
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