儿童英语小故事 46. Two Boys and a Baseball

　　Billy plays catch with a baseball and a baseball glove. He plays catch with his friend. His friend has a glove too. Billy throws the ball to his friend. His friend catches the ball in his glove. His friend throws the ball back to Billy. Billy catches the ball in his glove. The ball goes back and forth¹.

1 forth   

adv.向前；向外，往外

参考例句：

• The wind moved the trees gently back and forth.风吹得树轻轻地来回摇晃。
• He gave forth a series of works in rapid succession.他很快连续发表了一系列的作品。