“我本科时的专业是通信工程，但是研究生学的是金融。”这句话用英语怎么说？

My major of undergraduate is Communication Engineering， but that of the graduate is Finance.

我本科时的专业是通信工程，但是研究生学的是金融。
I am undergraduate professional communication is however is a graduate school of finance.

My major in undergraduate stage is Communications Engineering, but in graduate stage is Finance

I obtained a bachelor’s degree in Communication Engineering, but I majored in Finance in my postgraduate years.或者I have a bachelor’s degree in Communication Engineering and a master’s degree in Finance.

你不是吧？你这么垃圾？还本科，研究生的？？？你什么垃圾学校的啊？