зPҺPPҺͶϢW(wng) x^(q) ȫ ʡPҺPPҺ зPҺPPҺ Ӣ^(q) A^(q) ɽ^(q) m^(q) ^(q) зPҺPPҺͶϢW(wng)P(gun)Ϣ 0 lP(gun)Ϣ ǸδҵҪИ˲ُϢc鿴M