### Chinese: 它们的原材料相同为何差价如此之大呢？
### English: Why is the price difference so big for the same raw materials?
### Errors: There is a minor error of incorrect translation has stylistic problems at "the price difference". There is a minor error of incorrect translation is missing content from the correct translation at "for the same raw materials".

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