專業是什麼英語怎麼說

Numerical analysis is one of the major subjects for the students in the department of mathematics.

數值分析是大學數學系的一門學科專業課。

This thesis is to investigate the bilingual teaching faculty for Foreign Trade majors.

本文對外貿專業課雙語教學師資問題作了較為深入的調查和研究。

Economics is my major.

經濟學是我的`主修課程。

The notion of major fields of study emerged.

主修課程的概念慢慢形成。

What are his major subjects?

他的主修課程是什麼？