undetectable 

  1. 形容詞
不可能檢測出的
探測不到的
察覺不到的

    
                        
    2. 
                                            

                

            

            
            

                

                
例句

                

                    
    
                                                    
  1. 
                                This operation is undetectable by the driver.                            
    2. 
                                                    
  2. 
                                Yet political reforms have been undetectable .                            
    3. 
                                                    
  3. 
                                In this way, the mailbox becomes undetectable to radar.                            
    4. 
                                                    
  4. 
                                The French thought that its entrance was undetectable .                            
    5. 
                                                    
  5. 
                                Mockneck dog collar which has a undetectable zipin hood.                            
    6.