promethium 

  1. 名詞
不可數名詞: 鉅

    
                        
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例句

                

                    
    
                                                    
  1. 
                                Most of the metal he wears and uses is Promethium .                            
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  2. 
                                Promethium is also the least stable element of the first 84.                            
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  3. 
                                The artificial element Promethium was named with the myth in mind.                            
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  4. 
                                No dangers from promethium aside from the radioactivity are known.                            
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  5. 
                                Both Technetium and Promethium have atomic numbers which are prime.                            
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