業ㄧㄝˋyè精ㄐㄧㄥjīng於ㄩˊyú勤ㄑㄧㄣˊqín

學業的精進在於勤奮努力。唐·韓愈〈進學解〉：「業精於勤荒於嬉，行成於思毀於隨。」

英mastery of study lies in diligence (idiom). You can only master a subject by assiduous study., Excellence in work is only possible with diligence., Practice makes perfect.