major

主修课, 成年人, 陆军少校

a commissioned military officer in the United States Army or Air Force or Marines; below lieutenant colonel and above captain; British statesman who was prime minister from 1990 until 1997 (born in 1943); a university student who is studying a particular field as the principal subject; the principal field of study of a student at a university

主要的, 较多的, 大部分的, 成年的, 严重的

主修