1. They've excavated a hole in the road. ������·������һ������
2. To allow renovations to be completed, scientists pioneered a new technique to excavate the bones. Ϊ��ʹ���¹���������ɣ���ѧ��������һ���¼������ھ������
3. The paper trys to excavate the quintessence of Confucianism from the angle of social security system, social security idea and social security tradition. �����Դ��籣�ƶ���ϵ����������籣��ͳ�Ƕ��ھ������ᱣ��˼���еľ�����Ϊ�����
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v.
1. lay bare through digging
2. find by digging in the ground
3. form by hollowing
4. remove the inner part or the core of