Hot Dogs May Cause Genetic Mutations 　 Everyone knows hot dogs aren't exactly healthy for you, but in a new study chemists find they may contain DNA-mutating(变异) compounds that might boost one's risk for cancer.众所周知热狗并非绝对健康的食品，但是最新研究说化学家们在热狗中发现了致癌的DNA变异化合物。