In our school. we take some courses in art and science before we decide on our major.

　　在我们学校，在决定主修课前，通常会修一些艺术和科学课程。

　　It's the same in our college. What are you going to major in?

　　我们学校也一样。你打算主修什么?

　　I think I'll major in economics. How about you?

　　我想我会主修经济。你呢?

　　I haven't decided yet.

　　我还没决定。

　　decide on 决定，选定

　　major in 主修