eras
📖 中文释义
- n. 纪元, 时代；年代（era的复数形式）
🔗 释义中的汉语词
🧩 词形变化
原形 era
📘 English Definition（英文释义）
- n a period marked by distinctive character or reckoned from a fixed point or event
- n a major division of geological time; an era is usually divided into two or more periods
- n (baseball) a measure of a pitcher's effectiveness; calculated as the average number of earned runs allowed by the pitcher for every nine innings pitched