diligent student, studious person
彼は実に勉強家だ。
He is truly diligent in his studies.
ジョンは勉強家だ。
John is a diligent student.
彼は誰にも負けない勉強家だ。
He is the most dedicated student of anyone I know.
私のクラスは全員が勉強家です。
Everyone in my class is a diligent student.
ジョンは熱心な勉強家だ。
John is a dedicated student.