What happened to your head, Daming?

你的头怎么了，大明？　

Oh, Sam and I went for a bike ride yesterday.

哦，萨姆和我昨天去骑自行车了。

And then...?

然后呢……？

And then we were hungry and thirsty.

然后我们又饿又渴。

Did you buy some water?

你们买了一些水吗？　

No, we bought a watermelon.

不，我们买了一个西瓜。

Sam carried the watermelon on the bike.

萨姆用自行车带着西瓜。 　

Did you fall off your bike?

你从你的自行车上跌落下来了吗？　

No, Sam fell off his bike.

不，萨姆从他的自行车上跌落下来了。

And I bumped my head! Then he took me and the watermelon to the hospital.

我撞伤了我的头！然后他带我和西瓜去了医院。

Ha ha...

哈哈……