They love to run around on the playground.

他们喜欢在操场上跑来跑去。

youdao

After busy studying, I usually run on the playground, and I think that's the most wonderful time in a day. I love this sport since I'm 4, but at that time I only run for fun without any purpose.

繁忙的学习后，我经常在操场上跑步，我觉得这是一天中最美好的时光，我喜欢这项运动，因为我4岁，但在那个时候，我只为了乐趣而没有任何目的。

youdao

After busy studying, I usually run on the playground, and I think that's the most wonderful time in a day. I love this sport since I'm 4, but at that time I only run for fun without any purpose.

繁忙的学习后，我经常在操场上跑步，我觉得这是一天中最美好的时光，我喜欢这项运动，因为我4岁，但在那个时候，我只为了乐趣而没有任何目的。

youdao