### Chinese: 所以他们在听装的定价上，有了一个很大的上升幅度来保障他们的利润空间。
### English: So they have a big increase in the pricing of listening equipment to protect their profit margins.
### Errors: There is a major error of incorrect translation does not accurately represent the correct translation at "listening equipment". There is a major error of incorrect translation includes information not present in the correct translation at "big increase". There is a major error of incorrect translation has stylistic problems at "protect their profit margins".

### Improved English: Therefore, in the price setting of the canned ones, they set it much higher to guarantee their profits.