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安徽省蚌埠市读者年继堂来信询问:经常在大型体育赛事的报道中看到“黑马”的字样,但对“黑马”的来历并不清楚,特写信询问。
The readers of Bengbu City, Anhui Province, following the letter from the following inquiry: often seen in the reports of major sports events, “dark horse”, but the origin of “dark horse” is not clear, close-up letter asked.