My shock and embarrassment （at finding mother in tears） was a perfect proof（ of how little I understood the pressures on her）括号内的分别修饰前面的名词My shock and embarrassment 主was 谓a perfect ...at finding mother in tearsΪʲô��atof how little I understood the pressures on herΪʲô��ofhow�����ʲô����at�ȽϺ��ʰ� ���ҵ����ڿ޵��������������� ���������Ҫ�и����ڡ� ��� of how little I understood the pressures on her������proof�ģ���ʺ����ܹ�Ҫ�Ӹ�of����which��that ֮������� how ���̾�� ��������������٣�