### Chinese: 在食用受污染宠物食品后死亡的宠物的尿样中，均发现了氰尿酸和三聚氰胺。
### English: Acid and melamine were both found in urine samples of pets who died after eating contaminated pet food.

### Improved English: Cyanuric acid and melamine were both found in urine samples of pets who died after eating contaminated pet food.
