英语语法分析

The stomatopathy is the frequent formidable disorder in clinic in HIV/AIDS patients.

AIDS患者常见的口腔病变是临床较为棘手的病症之一。

BACKGROUND: It has been verified in relevant clinical and epidemiological researches in recent years that a part of stomatopathy is associated to psychological stress factors.

背景：近年来临床和流行病学相关研究都证实部分口腔疾病的发生与心理应激因素相关。