(y) > ͯb„ > u(png)Փ0l
(i)Ĵ(l)ɽ_(ki)I(y)
   T(mn)u(png)Փ
 
(y)  һ(y)  1   һ(y)  ĩ(y)
W(wng)u(png)ՓHW(wng)ѱ_(d)(g)˿ͯbW(wng)ͬ^c(din)C(sh)!