### Chinese: 看过等级分类的你应该已经发现，橄榄油的酸度是一个非常重要的指标。
### English: After looking at the classification you should have found that the acidity of olive oil is a very important indicator.
### Errors: There is a major error of incorrect translation has stylistic problems at "you should have found". There is a minor error of incorrect translation includes information not present in the correct translation at "very important".

### Improved English: After reading the classification, you may find the acidity of olive oil is an important index.