### Chinese: 通过红外光谱 (FTIR) 进行比较后发现，这些结晶的成分与在受影响宠物的尿液中发现的结晶成分吻合。
### English: A comparison by infrared spectroscopy (FTIR) revealed that the^ composition of these crystals matched those found in the urine of affected pets.
### Errors: There is a minor tokenized sentence error in the English translation.

### Improved English: A comparison by infrared spectroscopy (FTIR) revealed that the composition of these crystals matched those found in the urine of affected pets.
