### Chinese: 许多人少年时候也有理想，老了之后，却忘了理想，或追求理想，却沦为偏执。
### English: Many people also had ideals when they were teenagers, but when they got old, they forgot their ideals or pursued them, but became paranoid.
### Errors: There is a major error of incorrect translation has stylistic problems at "Many people also had ideals when they were teenagers". There is a major error of incorrect translation includes information not present in the correct translation at "but when they got old". There is a major error of incorrect translation is missing content from the correct translation at "pursued them, but became paranoid".

### Improved English: Many people had dreams when they were young, but they forgot about them when they got older; or, they pursue their dreams and become paranoid.