英语语法分析

County is a hyperendemic area of malaria in history.

瑞丽县属于历史上的高疟区。

This hyperendemic area is characterized by particular climate and social habits.

这一发病率高而持续的地区特点是特殊气候和社会习惯。

Risk factors for recurrence have not been widely studied, particularly in trachoma hyperendemic areas. METHODS.

复发的危险因素尚无深入研究，尤其是在沙眼的高发区。