We've all heard of the fight to combat malaria in mostly poor, tropical countries.

我们都听说过在许多贫穷热带国家进行的旨在消灭疟疾的战斗。

youdao

We've all heard of the fight to combat malaria in mostly poor, tropical countries.

我们都听说过在许多贫穷热带国家进行的旨在消灭疟疾的战斗。

youdao