1. Not only does this cause morbidity for patients, but also enormous healthcare and socioeconomic costs. �����Ի��߷�����ԭ��Ҳ�Ǿ��ҽ�ƺ���ᾭ�óɱ���
2. Xerostomia has a significant impact on the patient?s speech, deglutition, sleep, and increases the morbidity rate of the tooth. ���ʰ����ƺ�ڸ���֢�Ի��ߵĽ��������ʡ�˯��������Ӱ�죬�������ļ������ӡ�
3. Research finds that MEV is the etiological agent of mink viral enteritis and causes acute diarrhea in mink, with high morbidity and mortality. �о�������MEV������ˮ�������Գ��IJ�ԭ�壬�ܹ�����ˮ�����Ҹ�к�����нϸߵķ����ʺ������ʡ�
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n.
1. the relative incidence of a particular disease
2. an abnormally gloomy or unhealthy state of mind
3. the quality of being unhealthful and generally bad for you