它便宜，易于服用，副作用少，在消灭南欧和美国南部的疟疾中起到了重大作用。

Cheap, easy to administer, and with few side effects, it played an important role in eradicating the disease in southern Europe and the southern United States.

youdao

它便宜，易于服用，副作用少，在消灭南欧和美国南部的疟疾中起到了重大作用。

Cheap, easy to administer, and with few side effects, it played an important role in eradicating the disease in southern Europe and the southern United States.

youdao