- base on balls
 - 四坏球后送上垒
 
参考例子
           - 1.give a base on balls to; in baseball.
 - 自由上垒是棒球运动的一个规则。
 
- 2.The Mets loaded the bases with two singles and a base on balls.
 - 麦兹队以两支安打和一次保送而占满垒。
 
- 3.The Mets loaded the bases with two singles and a base on balls.
 - 后来道奇队靠着两个安打和一个四坏球保送而形成满垒。
 
英文解释
           - n.
 - 1.(baseball) an advance to first base by a batter who receives four balls
 
网络释义
               - base on balls
 - 四球安全上垒; 四坏球后送上垒; 四坏球上垒; 四坏球自由上垒;
 
- walk base on balls
 - 四坏球; 四球;