based on past performances
A more realistic goal, based on past performances, would be the 200- and 400-meter medleys, the 100- and 200-meter freestyles and the 100- and 200-meter butterflies, plus the relays, for nine golds.
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based on past performances
根据过去的表现
以上为机器翻译结果，长、整句建议使用 人工翻译 。