in the playgroud
在操场上
以上为机器翻译结果，长、整句建议使用 人工翻译 。
In front of the teaching building is a large playground. After class, we are running in the playgroud, and play, there are many trees on the playground.
在教学楼前面有一个大操场。下课后，我们在操场上跑步，打球，玩耍，操场上还有许多树。
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