這是美國淘金時代的故事：

青年農(nóng)民達比賣掉自己的全部家產(chǎn)，來到科羅拉多州追尋黃金夢。他圍了一塊地，用十字鎬和鐵鍬進行挖掘。經(jīng)過幾十天的辛勤工作，達比終于看到了閃閃發(fā)光的金礦石。繼續(xù)開采必須有機器，他只好悄悄地把金礦掩埋好，暗中回家湊錢買機器。

當他費盡千辛萬苦弄來了機器，繼續(xù)進行挖掘時，不久就遇到了一堆普通的石頭，達比認為：金礦枯竭了，原來所做的一切將一錢不值。他難以維持每天的開支，更承受不住越來越重的精神壓力，只好把機器當廢鐵賣給了收廢品的人，“卷著鋪蓋”回了家。

收廢品的人請來一位礦業(yè)工程師對現(xiàn)場進行勘察，得出的結(jié)論是：目前遇到的是“假胍”。如果再挖三尺，就可能遇到金礦。收廢品的人按照工程師的指點，在達比的基礎

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