hilly loess region on the Loess Plateau

loess deposit on the central Chinese loess plateau

“Black soil type” deteriorated grassland

deteriorated

deteriorated appearances

deteriorated artifically sown grassland

deteriorated case

deteriorated community

Deteriorated concrete pavement

Deteriorated forests

deteriorated grassland

Deteriorated grasslands

deteriorated lands

deteriorated model

Deteriorated Oil

deteriorated pasture

deteriorated series

deteriorated silk

deteriorated stand