### Chinese: 它们的原材料相同为何差价如此之大呢？
### English: Why do they have the same raw materials and the price difference is so big?
### Errors: There is a major error of incorrect translation does not accurately represent the correct translation at "Why do they have the same raw materials". There is a major error of incorrect translation has stylistic problems at "the price difference is so big".

### Improved English: Why are the prices so different when the raw materials are the same?