
                ڡ·ʹʱ䡱TE ˵

           ݾɻ·ϼ̲õ
       ƻ׼ڣһѡһǲ½·ƻ׼  
        Tɹ·ȼȷ; һǲþ·ʣƻ׼ T1
       ɹ·ȼȷƻ׼ T ȥ·ʹʱTE
       ǰһѡ񣬳Ҫûڡ·ʹʱ䡱ı
        0  ע⣬ ǼϵҪ ζ
       ·ʹʱ䡱Ϊ 0 
      
           ɻ·ϲ̲ʱ
       ̲Ҫ·ʹùܣ˳涨
       ׼һɲþ·ʣƻ׼ T1 ζŵɻ
       ·ϲ̲ʱڡ·ʹʱ䡱
       ıв 0 