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
Mattingly played first base for the Yankees.马丁利在扬基队任一垒手。
Idioms
get to first baseidiomUSinformal热吻
to kiss someone in a sexual way
get to/reach first baseidiomUSinformal获得初步成功，跨出第一步
to have the first achievement or agreement that is needed for later success
The proposal is so poorly designed, they won't even get to first base with the directors.这个计划做得太差了，在主管这里连第一关都过不了。