它是一项简单的球类运动。
——杰瑞，你会打网球吗？ ——是的，我会。它是一项简单的球类运动。
—Jerry, can you play tennis? —Yes, I can. It's an easy ball game.
到目前为止，已经有了玩如网球和篮球这样的球类运动的地方，但是对于其他运动，像是滑冰和轮滑而言呢？
There have been places to play ball games so far like tennis and basketball, but what about other sports, like skating and rollerblading?
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