Researchers treated E. coli bacteria with small amounts of silver.

研究人员用少量的银治疗大肠杆菌。

Scientists have already found a way to use E. coli bacteria to make biofuels.

科学家已经找到了一种利用大肠杆菌制造生物燃料的方法。

They also grew a batch of pathogenic E. coli bacteria, the kind that cause traveler's diarrhea.

他们还培养了一批致病性大肠杆菌，这是导致旅行者腹泻的一种细菌。