earned run average
earned-run-average的词性:
n.Abbr. ERABaseball (名词)缩写 ERA【棒球】
1. 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