回答

・diligent
・industrious
・hard-working

「勤勉」可以用 diligent、industrious、hard-working 來表達。

diligent "勤勉的、勤奮學習的"
industrious　 "勤勉的、勤勞的、努力工作的」"
hard-working　"勤勉的、工作努力的"。

He's one of the hardest-working employees in the company.
『他是公司中最勤勉的員工之一。』

Her diligence was the secret to her being the best in her school.
『她的勤勉是她學校成績最好的秘訣。』

有幫助｜0