我对他们传统的丰富性感到惊讶。

I was amazed by the ___richness of their traditions.

你将发现古代墨西哥文化的丰富性。

You will discover the ___richness of ancient Mexican cultures.

当地生物多样性的丰富性确实令人瞩目。

The ___richness of the local biodiversity is truly remarkable.