如今登革热已成为超过100个国家的地方性流行病。

It is now endemic in more than 100 countries.

youdao

本文报道我国地方性砷中毒病区的分布、类型和地理流行病学特征。

In this paper, the distribution, type and geographically epidemic character of arsenism in China were reported.

youdao

目的对饮水型高氟病区进行流行病学调查及实验室检测，研究地方性氟中毒患者骨代谢的生化敏感标志物。

Objective To Study sensitive mark of biochemistry of bone metabolize of The Endemic Fluorosis by epidemiology examine and lab check up in high fluorine area of drinking water.

youdao