id	keyword
ca-2833	sand
ca-2833	time
ca-2833	university
ca-2833	press
ca-2833	future
ca-2833	china
ca-2833	minqin
ca-2833	dunes
ca-2833	state
ca-2833	politics
ca-2833	new
ca-2833	control
ca-2833	process
ca-2833	university press
ca-2833	desert
ca-2833	succession
ca-2833	chinese
ca-2833	landscape
ca-2833	desertification
ca-2833	processes
ca-2833	species
ca-2833	forms
ca-2833	engineering
ca-2833	anthropology