softball ground

n.

垒球场；

Of Fossils (Softball) and Catfish or, the Essay Is in the Ground
THE RELATIONSHIP BETWEEN GROUND REACTION FORCE AND SOFTBALL PITCH VELOCITY
ANALYSIS OF GROUND REACTION FORCE DURING FASTBALL AND CHANGE-UP SOFTBALL PITCHES
Lower-extremity ground reaction forces in youth windmill softball pitchers.
GROUND REACTION FORCE ANALYSIS OF SOFTBALL WINDMILL PITCH
Characteristic ground reaction forces in softball pitching.
Softball game on the sportsgrounds
A Sports Ground for Softball
Union Beats Battle Ground 2-1 in Softball
Ground Broken for New softballstadiumatISU