first base

剑桥词典

in baseball , the first of four places you must run to after hitting the ball and before scoring a point , or the position of a player defending this place
（棒球的）一垒；一垒手的防卫位置
Mattingly played first base for the Yankees. 马丁利在扬基队任一垒手。

习语

get to first base
get to/reach first base 返回 first base