Ϫֳt(y)ԺͶϢW(wng) x^(q) ȫ |ʡֳt(y)Ժ Ϫֳt(y)Ժ ƽɽ^(q) Ϫ^(q) ɽ^(q) Ϸ҅^(q) Ϫh ʿh ^(q) Ϫֳt(y)ԺͶϢW(wng)PϢ 0 lPϢ ǸδҵҪИ˲ُϢc鿴M