### Chinese: 美学是以对美的本质及其意义的研究为主题的学科。
### English: Aesthetics is a science that's the subject of research into the nature and meaning of beauty.
### Errors: There is a major error of incorrect translation has stylistic problems at "science that's the subject of research". There is a minor error of incorrect translation includes information not present in the correct translation at "the subject of research".

### Improved English: Aesthetics is a discipline which studies the essence and significance of beauty.