1.hardworking adj. 努力的,勤奋的例子:To acquirethe wisdom means to possess natural endowments and hardworking. 要取得智慧,应具备天资,应勤奋学习。 2.industrious adj. 勤劳的,勤勉的,刻苦的例子:I am glad that you are going in for such intelligent, industrious profession . 我很高兴你在从事这样一种有才智的、勤勉的职业。 3.diligent adj. 孜孜不倦的;勤勉的;刻苦的例子:John is more diligent than any other student in his class. 约翰比班上其他的同学用功。 如果你是写作文要用的话,个人认为diligent比较好,算是比较高级的词汇。满意请采纳,不解请追问,谢谢!o(∩_∩)o