美洲布发罗水牛群驰骋美国草原的景色壮观而诱人,但它却是流动的,常常可遇而不可求,于是,一个年轻人就想出一个主意。他在报纸上刊登了一则广告,以一美元的价格销售一份十分有趣的观看水牛群的邀请函,邀请函除了包括对水牛群出现的时间的预测外,还包括如果预测出现差错,不能看到水牛群的话,邀请函销售方将赔偿购买者两美元。这份独特的销售函吸引了很多人,有人看到了壮观的水牛群,也有人没有如愿看到,不过没有看 The breathtaking and seductive scenery of the American Buffalo Buffaloes galloping across the prairie, but it is fluid and often met but not desirable, so a young man came up with an idea. He ran an ad in the newspaper, selling a very interesting invitation to watch a herd of buffalons for $ 1, including an estimate of when the buffalo herd appeared, as well as an estimate of how long it would have taken When you see a buffalo herd, the seller of the invitation will pay the buyer two dollars. This unique sales letter drew a lot of people, some people saw the spectacular buffalo herd, and some did not want to see, but did not see