xԺУ
kWҎ(gu)
ֹĿǰֹ]κһI(y)ęC(gu)ԺУM^ҽؔ(jng)ȫ(ni)uxˡȫ28ʾԸԺȫʾԸԺУȫǸɸԺ@һԺУkWkWɫrкܴһ֞ИI(y)ԺУ͘I(y)ʸ͘I(y)ӴθcP(gun)ע磬ұߵȌƌWУI(y)g(sh)WԺI(y)WĴͨI(y)g(sh)WԺI(y)WԺƽɽI(y)I(y)WԺF·I(y)g(sh)WԺV|I(y)g(sh)WԺ
xИI(y)ԺУ
x=xI(y)xI(y)=x͘I(y)ИI(y)ԺУLڵkW^зeS}P(gun)ϵP(gun)I(y)g(sh)ԏҪ˜ʸ_O(sh)P(gun)I(y)ԺУ٣ԿxԺУеƌI(y)͘I(y)Ҳߡ