operator.
		
		
					
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																 美
										
													美 
																 
										
							 
		
	 
 
	
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																	名词 operator:
									
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										(mathematics) a symbol or function representing a mathematical operation										
																				 
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										an agent that operates some apparatus or machine										
																				 
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										someone who owns or operates a business										
																				 
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										a shrewd or unscrupulous person who knows how to circumvent difficulties										
																				 
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										a speculator who trades aggressively on stock or commodity markets										
																				 
 
 
 
 
 
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	海词词典,十七年品牌