Alexander Fleming was a bacteriologist who for 15 years had tried to solve the problem of how to get rid of the disease carrying germs or microbes in the human body without causing any dangerous side effects.

亚历山大·弗莱明 (Alexander Fleming) 是一名细菌学家，他 15 年来一直试图解决如何在不引起任何危险副作用的情况下清除人体内携带病菌或微生物的疾病的问题。