What are the four words describing the environment in Prairie and Silk Road?

Vast and boundless

stretch/extend as far as the eye can see

Thousands of miles of fertile land-endless fertile soil

stretch/extend as far as the eye can see

A large flat land.

infinite

be boundlessly broad

The grassland is endless.

infinite

Broad and gloomy

A vast plain

infinite

Everything is green.

be boundlessly broad

The wilderness is endless and endless.

Vast and far away, vast, rich, fertile and quiet.

Silence, desolation, barrenness and desolation

Hehan is thousands of miles across the plains, and Ma Pingchuan is endless.

The aquatic plants are delicious and boundless.

Vast, ups and downs, valleys and valleys, rough ink lines.

Satisfied answer, endless words, great kindness. I really appreciate it.