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It was a joke, of course, but five million Americans were amused enough to pay five dollars a piece for the rocks. And the man who dreamed up the idea really made a killing.
当然销售宠物石头是个逗乐的笑话,但是有五百万美国人竟然给逗得乐于花钱去买五美元一个的宠物石头.而那忽发奇想的人也着着实实赚了一大笔.
make a killing: to make a lot of money quickly 发大财;获取暴利;财运亨通