中文字幕精品视频在线|中文字幕在线观看|亚洲v日本v欧美v在线播放|伊人网中文字幕

<nav id="3u6n6"></nav><samp id="3u6n6"><tr id="3u6n6"><track id="3u6n6"></track></tr></samp>
    <legend id="3u6n6"><fieldset id="3u6n6"></fieldset></legend>
      

      

      2. 
		
		
      
			
			
      
				
			
      
			
			
		
      
    
      
        
      
            
      
                
                    
      
	
      extinction
      
	
      英 [?k'st??(k)?(?)n; ek-]
美[?k'st??k??n]

      


	    
      
	
        
    
      • n. 消失；消滅；廢止
        • 
    
      
	
      

      

    
      英英釋意
      
	
      
	
      1. no longer in existence;
      "the extinction of a species"
      

      2. no longer active; extinguished;
      "the extinction of the volcano"
      

      3. the reduction of the intensity of radiation as a consequence of absorption and radiation
      

      4. complete annihilation;
      "they think a meteor cause the extinction of the dinosaurs"
      

      5. a conditioning process in which the reinforcer is removed and a conditioned response becomes independent of the conditioned stimulus
      

      6. the act of extinguishing; causing to stop burning;
      "the extinction of the lights"