“垒球”造句

业余垒球协会的裁判员名单上的人数已经减少到了57,000名。
The Amateur Softball Association's roster of umpires has declined to 57,000.

垒球运动中采用低手投球。
In softball, pitches are tossed underhand.

垒球是实心的.
The softball is solid.