The firecracker went off and scared Jack's dog.

　　爆竹響了，把杰克的狗嚇了一跳。

　　The boy touched off the firecracker and ran away.

　　那男孩點燃了爆竹就跑開了。

　　In the countryside, people can play firecracker in open space.

　　在鄉(xiāng)村，人們可以在空地放鞭炮。