doctor ��ͨ�ôʣ���ָ����ҽ������һ������ҽ�ʸ���ˡ� physician ָҽԺ���ڿ�ҽ���� surgeon ָר����ƻ�ר������ij�����ֵ����ר��ҽ��������ҽ��һ����Ի��߽����������ơ� dentist ָר�Ŵ���������ҽ����
�����
1. Nature is the best physician. ��Ȼ����õ�ҽʦ��
2. Time is the great physician. ʱ������õ�ҽ����
3. A physician, a civil engineer, and a consultant were arguing about what was the oldest profession in the world. һλҽ����һλ��������ʦ��һλ��ѯ����������ʲô������������ϵ�ְҵ��