zhè / zuò / shān / lǐ / yǒu / xǔ / duō / tiān / rán / yán / xué / shì / hé / tàn / xiǎn / zhě / kǎo / chá

这座山里有许多天然岩穴，适合探险者考察。

There are many natural caves in this mountain, making it suitable for explorers to study.