大多数都是用on the playground,几乎没有用in the playground
一般 on the playground 更常用
in the playground 也不能算错误，但 in 一般用于封闭的空间。 in the room
Class is over。 Most of the students go to the playground to take part in all kinds of sports。 Look! There are many students playing basketball。
One is jumping up and casting the ball into the net。 In the distance there‘re some girls doing rope skipping。 How swift their actions are! They‘re like sparrows。
Not far away from them。 a few boys are playing ping-pong。 What an interesting school life!
They know clearly that having a strong and healthy body is very important both to their study and their future success。
【参考译文】
下课了，大部分学生都到操场参加各种运动。
瞧!那儿有许多学生在打篮球。一个学生正跳起来往蓝中投球。在远处，一些女孩在跳绳。他们的动作真敏捷，就像麻雀一样。
离他们不远处，几个男孩在打乒乓球。多有趣的学校生活呀!
他们都清楚地知道，拥有一个强壮健康的身体对他们的学校和未来的成功至关重要。
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