To make a point, let me repeat a known fact about the German tennis player Steffi Graf, and when Graf was in the final rounds of major tournaments, her father was known to bet against her.
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- 也容我在此重复一个故事:网球女将格拉夫的父亲就是以"赌"来买"保险的,格拉夫的父亲在女儿参加重大比赛时,总是下注赌女儿会输,不懂期货原理的体育记者们都以为他迷信,认为赌女儿输球,女儿就会赢球。