groundball的用法和樣例：
例句
用作名詞 (n.)
- If it was, you wouldn't have groundball pitchers and fly ball pitchers.
如果真的是照這些人說的那樣，就不會有所謂的滾地球投手及飛球投手了。 - It's true, Wang relies on a sinker to get groundball outs, not a fastball in order to tally strike outs.
沒錯，王建民靠伸卡球來製造滾地球出局，不是靠速球來三振對手。
