孩子们在山洞里发现了一些奇怪的石头。

háizimen zài shāndòng lǐ fāxiàn le yīxiē qíguài de shítou.

The children discovered some strange stones in the cave.

下雨了，我们赶紧躲进旁边的山洞。

xià yǔ le, wǒmen gǎnjǐn duǒ jìn pángbiān de shāndòng.

It started raining, so we quickly ducked into the nearby cave.

据说这个山洞有上千年的历史了。

jùshuō zhège shāndòng yǒu shàng qiān nián de lìshǐ le.

It is said that this cave has a history of over a thousand years.