hilly loess region on the Loess Plateau

loess deposit on the central Chinese loess plateau

loess-like loess

“Black soil type” deteriorated grassland

“black soil type”deteriorated grassland

deteriorated

deteriorated appearances

deteriorated artifically sown grassland

deteriorated case

deteriorated community

Deteriorated concrete pavement

deteriorated due to

Deteriorated forests

deteriorated grassland

Deteriorated grasslands

deteriorated insulator

deteriorated items

deteriorated lands

deteriorated model