1、He's hard at work on a new novel.───他正努力忙着写一本新小说。
2、She has worked hard at her marriage.───她在婚姻上已经很努力了。
3、We're hard at work on the episodic demo, and are very excited to get it out to you as quickly as we're able.───我们正在努力工作的情景演示，并很高兴能得到它你尽快我们可以。
4、Studying in a foreign language is always hard at the beginning, but I'll get over it.───刚开始学习外语总是很困难的，但是我会克服的。
5、Researchers are hard at work trying to gauge how much will melt and when.───研究人员正在努力工作，试图估算出将有多少会消融以及何时消融。
6、were hard at the end of the war.───战争后期生活很艰苦。
7、I've worked hard at it for a whole week, but it seems that I haven't made any progress.───整个星期我都在努力学习英语，但是好像没有任何进步。
8、I was surfing the Internet and stared long and hard at my scree, There was a link to a site for a very small minority of unique pilots.───当时我在上网，我对着屏幕凝神呆望良久。我看到一个网站的链接，这个网站的对象是一小撮非常特别的飞行员。
9、"Well, Russ, " she said, "if you work hard at this White House job, you might be able to make something of yourself. "───“嗯，罗素，”他说，“如果你做好白宫这份工作，你会有所收获的”
hard at（英语使用场景）
1、That is why I'm working hard at my lesson.
2、He's been hard at work all morning.
3、She's working hard at her term paper.
4、Life is hard at times.
5、He's hard at work on a new novel.
6、Sam stared hard at the floor.
7、Instead of working hard at her lessons, Mary spends her time building a castle in the air.
hard at（意思翻译）
努力于
hard at（相似词语短语）
1、work hard at───努力工作（学习）；努力学习; 攻读
2、hard at it───拼命工作， 工作卖力
3、hard by hard───一点一点地
4、hard surface───硬表面，硬质路面，壳体; 壳斗；硬面；淬火表面
5、work hard play hard───努力工作，放肆玩乐
6、hard───adj.努力的；硬的；困难的；辛苦的；确实的；严厉的；猛烈的；冷酷无情的；n. (Hard)人名；(英、芬、瑞典)哈德；adv.努力地; 猛力地; 严重地; 沉重地；adv.努力地；困难地；辛苦地；接近地；猛烈地；牢固地；adj.困难的; 硬的; 有力的; 努力的
7、hard wearing hard───耐磨的
8、play hard work hard───放肆玩乐，拼命工作
9、hard road───硬面区；石砾道
hard at（双语使用场景）
1、He's hard at work on a new novel.───他正努力忙着写一本新小说。
2、She has worked hard at her marriage.───她在婚姻上已经很努力了。
3、We're hard at work on the episodic demo, and are very excited to get it out to you as quickly as we're able.───我们正在努力工作的情景演示，并很高兴能得到它你尽快我们可以。
4、Studying in a foreign language is always hard at the beginning, but I'll get over it.───刚开始学习外语总是很困难的，但是我会克服的。
5、Researchers are hard at work trying to gauge how much will melt and when.───研究人员正在努力工作，试图估算出将有多少会消融以及何时消融。
6、were hard at the end of the war.───战争后期生活很艰苦。
7、I've worked hard at it for a whole week, but it seems that I haven't made any progress.───整个星期我都在努力学习英语，但是好像没有任何进步。
8、I was surfing the Internet and stared long and hard at my scree, There was a link to a site for a very small minority of unique pilots.───当时我在上网，我对着屏幕凝神呆望良久。我看到一个网站的链接，这个网站的对象是一小撮非常特别的飞行员。
9、"Well, Russ, " she said, "if you work hard at this White House job, you might be able to make something of yourself. "───“嗯，罗素，”他说，“如果你做好白宫这份工作，你会有所收获的”
hard at（英语使用场景）
1、That is why I'm working hard at my lesson.
2、He's been hard at work all morning.
3、She's working hard at her term paper.
4、Life is hard at times.
5、He's hard at work on a new novel.
6、Sam stared hard at the floor.
7、Instead of working hard at her lessons, Mary spends her time building a castle in the air.
8、People tend to work hard at this stage of life.
9、She gripped hard at the arms of her chair.