英语语法分析

Scientists haven't found the pathogeny of the disease.

科学家们尚未发现这种病的病因。

At the beginning of 2003, no one knew what the pathogeny of SARS was.

2003年年初，SARS来了，病原是什么？

Objective To survey the pathogeny, diagnosis and treatment of corneal apoplexy.

目的探讨角膜内出血的病因和诊断、治疗的经验。