earned run averagen.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