| 单词 | earned run average |
| 释义 | earned run average earned run average n.Abbr. ERABaseball （名词）缩写 ERA【棒球】 A measure of a pitcher's performance obtained by dividing the total of earned runs allowed by the total of innings pitched and multiplying by nine.投手责任得分率：一种测量投手表现情况的方法，将所得的责任分除以所有回合中所投的球数再乘以九，即得投手责任得分率 |
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