英语语法分析

"We know things are really bad when the light goes out," says Dr Widder.

“我们知道当光线暗的时候，事情就不妙了(指污染严重)，”韦德博士说道。

“The first system cost $500, 000 and was the size of a motorcycle, ” says Dr Widder.

威德接着说，“第一个这样的系统的成本是50万美元，和一个摩托车的大小相当。”

Dr Widder is working with a bioluminescent bacterium species called Vibrio fischeri that is sensitive to a wide variety of pollutants.

威德博士目前在研究一种叫做Vibrio fischeri的荧光细菌，这各细菌对于各种污染非常敏感。