nitrogen 

  1. 名詞
不可數名詞: 氮, 氮氣

    
                        
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例句

                

                    
    
                                                    
  1. 
                                Nitrogen levels on the bird islands are very high.                            
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  2. 
                                Too much nitrogen fertilizer has damaged this lawn.                            
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  3. 
                                Legumes produce some of their own nitrogen fertilizer.                            
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  4. 
                                Yeast readily assimilates ammonia as a nitrogen source.                            
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                                About 78% of the molecules in dry air are nitrogen (N2).                            
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