Millions of people are sickened each year by Salmonella. But a genetically-engineered version of the bacteria may someday be used as a weapon against cancer. As the old saying goes, "The enemy of my enemy is my friend."________________________每年有数百万的人因沙门氏菌生病,但是经过基因转换工程后的沙门氏菌在未来的某一天可以被用来作为消灭癌症的武器.就像一句古话所说:"我敌人的敌人,就是我的朋友."_________________________
