rocketry 

  1. 名詞
不可數名詞: 火箭技術
火箭研究

    
                        
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例句

                

                    
    
                                                    
  1. 
                                Congreve published three books on rocketry .                            
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                                Model rocketry is a safe and widespread hobby.                            
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                                Ian Fleming was fascinated by rocketry and space.                            
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                                It would take rocketry to get humans to the cosmos.                            
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                                Giant Leap Rocketry , Inc. has released its Magna-Frame.                            
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