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      acceleration
      
	
      英 [?ksel?'re??(?)n]
美[?k's?l?'re??n]

      


	    
      
	
        
    
      • n. 加速，促進(jìn)；[物] 加速度
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      英英釋意
      
	
      
	
      1. an increase in speed;
      "modern science caused an acceleration of cultural change"
      

      2. the act of accelerating; increasing the speed
      

      3. (physics) a rate of change of velocity