Diez

Diez

1

According to Diez , it is not clear exactly how this new virulence developed .

迪兹说，还不清楚这种新的毒性是如何发展出来的。
2

Before then , Diez says , E.coli wasn 't even considered a disease-causing germ .

他说，在那之前，大肠杆菌甚至不被认为是种致病的细菌。
3

But Diez says there is a connection .

但迪兹说，这中间是有关联的。
4

And the majority have remained relatively harmless until fairly recently , says University of Minnesota food safety professor Francisco Diez .

明尼苏达大学食品安全教授迪兹说，直到最近之前，大多数大肠杆菌相对来说都是无害的。