francium 

  1. 名詞
不可數名詞: (化學元素)鈁

    
                        
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例句

                

                    
    
                                                    
  1. 
                                The sixth alkali metal is now considered to be francium .                            
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  2. 
                                All of the discovered alkali metals excluding francium have many applications.                            
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  3. 
                                Among the first 101 elements in the periodic table, only francium is less stable.                            
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  4. 
                                This week's element is francium , which has the symbol Fr and the atomic number 87.                            
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  5. 
                                Its chemistry is predicted to be closer to that of potassium or rubidium instead of caesium or francium .                            
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