He is in the full conviction that real knowledge is the end product of a thorough study of the history.
He is in the full conviction that real knowledge is the end product of a thorough study of the history.
他深信，只有对历史加以透彻研究，才能真正学到知识。
He is in the full conviction that real knowledge is the end product of a thorough study of the history.
他深信，只有对历史加以透彻研究，才能真正学到知识。