广播电视英语短句 第 232 课：混合药物治疗-2

And it shortens the amount of time patients must spend in the hospital. 同时缩短病人在医院所需要时间的总和。

Sleeping sickness threatens millions of people in thirty-six countries in Africa. 昏睡病威胁非洲 36 个国家上百万人。

Most live in poor rural areas. 大部分人居住在穷困地区。

The disease is caused by the trypanosoma parasite. 些病是由 硝呋莫司寄生虫引起的。

It is spread to humans through the bite of infected tsetse flies. 通过被感染的采采蝇的叮咬传染给人类。