的確偷換概念。前麵說確定方法，就是風險盈利確定。後麵說風險盈利不確定，說明前麵說錯了。

來源: 求索2014 於 2023-03-26 10:49:18 [舊帖] [給我悄悄話] 本文已被閱讀：次

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