求翻译：A black dog walked into a butcher’s shop with a five-dollar bill in his mouth. He spent several minutes looking at the meat on display. He finally fixed his eyes on the lamb chops and barked, showing that he wanted to buy some of them. The butcher, thinking the dog wouldn’t know the difference, picked out the worst chops. The dog barked angrily and continued to bark until the butcher selected the finest chops. After the butcher took the money from the dog’s mouth, the dog picked up the chops and left the shop.是什么意思？

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