Tànxiǎn duì zài shān lǐ fāxiàn le yīgè jùdà de yándòng.
The exploration team discovered a huge cave in the mountains.
Zǎoqī rénlèi zhù zài yándòng lǐ, yǐ duǒbì wēixiǎn.
Early humans lived in caves to shelter from danger.
Zhège yándòng lǐ yǒu měilì de zhōngrǔshí.
This cave has beautiful stalactites.
