ָ: Cylin
    
: ѹ  峤Ȳʧ,
         г̳ȵ,Ϊʽ,
         ʹInsert Block ʽ޷ʵ  

λ: 
   1 ʽܱ      Yģ   ->       ->  ѹ 
   2             Y_ģ2   ->   ѹ 
                      
    , Parker, ǫ̩,   
  

 T -- ѡ        ==> ƶͷΪT
      ѡ(ڶ) ==> ƶͷΪ

 г --   ǰͼг,ͼ
                ͼ, ͼг