Over three weekends of hard work, Sally turned her design into a real, working go kart and painted it light blue.

经过三个周末的辛勤工作，莎莉把她的设计变成了一辆真正的、能够运行的卡丁车，并把它涂成了浅蓝色。

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In order to live up to their parents' expectations, most of the kids have to study hard even over vacations.

很多孩子为了不辜负家长的希望，甚至假期也要辛苦学习。

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If you hit it really hard and a long way, it goes over the boundary.

如果你真的击得很重，打得很远，它就会过界。

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Walking through these historic areas, visitors today might find it hard to believe that a deadly storm swept through the city over four years ago.

VOA: special.2010.01.22

I actually do get worked up over these things because it drives me nuts because these are not hard problems to solve and yet consistently throughout society and your own laptops there are dozens of examples I'm sure of poorly designed software.

我确实对这些东西很生气,因为它令我发狂,因为这不是很难解决的难题,然而贯穿整个社会,在你自己的笔记本上，我确信有很多这样,设计地很挫的软件的例子。

哈佛公开课 - 计算机科学课程节选

There's been a lot of work done on these over the years, but in fact, it's pretty hard to invent a good hash function. So my advice to you is, if you want to use something was a hash, go to a library. Look up a good hash function.

已经做过了很多的尝试和努力,但是事实是，很难发明出一个好的哈希函数,所以我给你们的建议是,如果你们想使用哈希功能,到函数库中查找一个好的哈希函数。

麻省理工公开课 - 计算机科学及编程导论课程节选

The No Labels movement has identified the deficit as a major issue where Americans simply want solutions over hard-line positions.

FORBES: Our Children's Budget

The outcome in Iraq is not so clear-cut, but characterizing it as a victory is the triumph of hope over hard-won lessons.

FORBES: Iraq: The Biggest Mistake In American Military History

It was "deeply dismayed by the actions of the Zimbabwean government - which is riding roughshod over hard-won democratic rights", the party said.

BBC: Mugabe defiant as criticism grows