doctoral student 和phD student 有什么区别?

doctoral student 和phD student 有什么区别? phd-track student什么意思 every student和each student有什么区别? any other student 和 other student有什么区别? pupil和student有什么区别?亲. student 和pupil有什么区别 student和classmate有什么区别 why is the student late?和 why is student late?有什么区别 加拿大留学 full-time student 和 part-time student ,到底有什么区别? as a student of us 和as a student of we 有什么区别 music student 与 musical student 有什么区别? student &s和student s有啥区别