wú xiàn qī 
		unlimited (time) duration
		 
		
		
														
		
		
					
				
		
			wú xiàn fēng guāng zài xiǎn fēng 
		The boundless vista is at the perilous peak (proverb)
fig. exhilaration follows a hard-won victory
		 
		
		
														
		
		
			 
		
				
		
			wú xiàn xiǎo 
		infinitesimal
infinitely small
		 
		
		
														
		
		
			 
		
				
		
			wú xiàn xiǎo shù 
		infinitesimal
infinite decimal expansion