The children tumbled about in the sand pit.

小孩在沙坑里翻滚着玩。

Go down the sand pit and dig for the bones of stegosaurus!

快到大沙坑里挖掘剑龙的骨头吧.

Go down the sand pit and dig for the bones of stegosaurus !

快到大沙坑里挖掘剑龙的骨头吧。