He and a friend used math to develop a system for picking winners in horseracing and started selling their "Stable-Boy Selections" tip sheets until they were shut down for not having a license.
他和一个朋友利用数学知识开发了一个在赛马比赛中选拔冠军的识别系统，然后开始推销他们的“马童筛选器”的内部消息传单，但因为无许可证被迫关停。
He and a friend used math to develop a system for picking winners in horseracing and started selling their "Stable-Boy Selections" tip sheets until they were shut down for not having a license.
他和一个朋友利用数学知识开发了一个在赛马比赛中选拔冠军的识别系统，然后开始推销他们的“马童筛选器”的内部消息传单，但因为无许可证被迫关停。
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