英语语法分析

Arsenism patients are not found.

未发现砷中毒患者。

Objective To study the pathogenic situation of arsenism caused by coal burning pollution.

目的了解燃煤污染引起慢性砷中毒的发病情况。

Objective To study the change of T-lymphocyte immune function in patients with coal-burning type arsenism.

目的探讨燃煤型慢性砷中毒患者T淋巴细胞免疫功能的改变。