id	keyword
fumecheng-4967	surface
fumecheng-4967	density
fumecheng-4967	phase
fumecheng-4967	system
fumecheng-4967	structure
fumecheng-4967	time
fumecheng-4967	equation
fumecheng-4967	model
fumecheng-4967	formation
fumecheng-4967	energy
fumecheng-4967	process
fumecheng-4967	pattern
fumecheng-4967	fig