1. Remember the parabola demonstrates a 68% chance that the stock will stay within the area by expiration. ��ס���������߳��ֳ�68%�ĸ��ʣ�����Ԥ�ڣ���ֻ��Ʊ��ͣ������������
2. Schaefer model The basic form of production model in which the relation between yield and effort takes the form of a symmetric parabola. Ѧ��ģʽ����ģʽ�Ļ�����ʽ������������Ŭ��֮��Ĺ�ϵ���棬ȡ�ԶԳ������ߵ���ʽ��
3. Combined with the relationship between evanescent wave penetration depth and incidence angle, a new parabola taper fiber probe is put forward. ���ٿ�Ų����������������֮��Ĺ�ϵ�����һ���µ��������ι���̽ͷ��
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n.
1. a plane curve formed by the intersection of a right circular cone and a plane parallel to an element