独一无二的邮票美国有一个著名的集邮商，他非常善于运用以退为进的策略，而且经常取得圆满的成功。他有一枚珍藏多年的邮票，后得知别人手里有同样的两枚，而且全世界也仅存这么三张了。他绞尽脑汁想弄到这两张邮票。他深知，物以稀为贵，别人是不会轻易“忍痛割爱”抛出这两 One-of-a-kind stamps The United States has a well-known philatelist who is very good at using retreat strategies and is often successful. He has a collection of many years of stamps, later learned that others have the same two, and the rest of the world only so three. He racked his brains to get the two stamps. He knows that things are rare, others will not easily “reluctantly cut love” thrown out of these two