B2 主修，以…为专业
to study something as your main subject at college or university
She majored in philosophy at Harvard. 她曾在哈佛大学主修哲学。
You have so many interests - what do you think you'll major in?
I went to the University of Pennsylvania, where I majored in finance.
I studied French at school and then majored in it at college.
Why did you decide to major in journalism?
See also: major verb