She just managed to keep the ball in play.

　　她把球勉強保持在界內。

　　Did the ball land on the green?

　　球落在果嶺了嗎？

　　Some animals roll themselves into a ball for protection.

　　有些動物蜷縮成一團以保護自己。

　　Please give me my ball back.

　　請把我的球還給我。

　　We're going to the ball game.

　　我們要去看棒球比賽。