That attracts flies and spreads disease, like eye infections.
这样做会招惹苍蝇并传播疾病，例如眼部感染。
2
Fruit flies from the same species differ in the number of bristles on their bellies; stalk-eyed flies differ in the lengths of their eye stalks.
同一种类的果蝇腹部的刚毛数量不等，杆状眼蝇的杆状眼长度不等。
3
By putting a protein from the human retina into fruit flies, researchers noticed that the insect modified its flight path just as if its eye had not been altered.