病因学

例句：

1. 1. The study of disease causes is crucial for understanding the origins of illnesses.
   研究疾病原因对于理解疾病的起因至关重要。
2. 2. Etiological research has led to significant advances in the treatment of infectious diseases.
   致病因素的研究已经导致传染病治疗的重大进步。
3. 3. Investigating the genetic basis of common diseases can help prevent their onset.
   调查常见疾病的遗传基础可以帮助预防其发生。