����ԭ�����ύ�ă�(n��i)�ݰ���Σ�U(xi��n)�Ĺ���Ո(q��ng)��
��ν�Q��
1���z���ύ��(n��i)�ݣ�
2����W(w��ng)վ�йܣ�Ո(q��ng)(li��n)ϵ���g�ṩ�̣�
3����ͨ�W(w��ng)վ�L(f��ng)�ͣ�Ո(q��ng)(li��n)ϵ�W(w��ng)վ����T