he industriously engages in unostentatious hard work
Related Translations:
埋头苦干: work with quiet hard application; bury oneself in work; engage in unostentatious hard work; immerse oneself in hard work; keep one's nose to the grindstone; plug away; quietly immerse ones
勤勤恳恳: work diligently and conscientiously; be (always) diligent and conscientious; earnest and assiduous; painstakingly; zealously and earnestly 短语和例子勤勤恳恳地为人民服务 be diligent and conscientious in