Translation of 'These are the core courses related to my major, and their scores are mostly above 85.'

'These are the core courses related to my major, and their scores are mostly above 85.' can be translated into English as:

'These are the core courses related to my major, and I achieved mostly above 85% in them.'

This translation emphasizes the academic achievements by using the phrase 'achieved mostly above 85%' instead of simply stating the scores. It also clarifies that the speaker is referring to their own scores.

Another option is:

'These are the core courses in my major, and I got mostly above 85% in them.'

This translation uses a more colloquial phrase 'got mostly above 85%' which is more common in everyday conversation.

The best translation will depend on the specific context and intended audience.