specialize

1. V-I If you specialize in a thing, you know a lot about it and concentrate a great deal of your time and energy on it, especially in your work or when you are studying or training. You also use specialize to talk about a restaurant which concentrates on a particular type of food. (在某事物上) 有專長

...a University professor who specializes in the history of the Russian empire. …一位專門研究沙俄歷史的大學教授。

2. specializationN-VAR 專門研究

This degree offers a major specialization in social policy alongside a course in sociology. 該學位提供一門社會政策主專業課和一門社會學課程。