The hard work of this grassroots effort resulted in the first Earth Day on April twenty-second, nineteen seventy.

VOA: special.2010.04.21

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

Mammon is the profiteer. Mammon is the goldsmith's son who wants to invest his talents with labor and with hard work in order to showa profit.

贪神是一位逐利者，他是一名金匠的儿子，想要,用自己的才智，劳动与汗水投资换取利润。

耶鲁公开课 - 弥尔顿课程节选

Madam C.J.Walker explained it this way: "If I have accomplished anything in life, it is because I have been willing to work hard."

VOA: special.2010.03.28

why did I work so hard in order to get into this place?

我为什么要拼命入读这所学校？

哈佛公开课 - 幸福课课程节选

It was hard work. The wet clothes were heavy, and the soap had lye in it.

VOA: special.2010.03.28

So, now that you're fully immersed in CS50 it's quite understandable 0 if you want people to know that you're in CS50 and so the teaching fellas have been hard at work putting together this year's line of apparel which includes sweatshirts, CS50 T-shirts and the like.

现在你已经完全沉浸,于CS50的学习，这完全可以理解,你很想让大家知道你在CS50学习0,我们的助教们已经,将今年的服饰收集在了一起,其中包括运动衫，CS50，T恤等等。

哈佛公开课 - 计算机科学课程节选

The kinds of minerals in clay affect how soft or hard it is to work with.

VOA: special.2009.09.09

I can only imagine though, at this point in the semester, what will become Milton's eventual championing of marriage is pretty hard to imagine, in part because we're just devoting our second class to a literary work given almost entirely to the virtue of chastity.

然而我只能认为，在学期的这个时候，什么将成为弥尔顿婚姻的最终捍卫者,一定难以想象，一部分是因为,我们的第二节课一直在讨论,关于贞洁的美德的作品。

耶鲁公开课 - 弥尔顿课程节选

"Today,in the face of violence from those who would only destroy, Iraqis took a step forward in the hard work of building up their country.

VOA: special.2010.03.13

Paul Perachi says all the hard work is clear in the final performance.

VOA: special.2010.06.03

Work was hard to find in any of the cities in Europe.

VOA: special.2010.05.13

They work hard. They practice their singing in Mr.Cockrell's classes.

VOA: special.2011.04.01

These paintings show Americans hard at work in different industries.

VOA: special.2009.01.02

(OMITTED) Students work as hard in class as they do on the basketball court, and Taylor says they are succeeding.

VOA: standard.2010.06.24

It's hard work done with basic tools. But many farmers lost the tools they need in January's earthquake.

VOA: standard.2010.04.02

The young people here are hard at play, and the Muslim elders are hard at work trying to keep them engaged in positive activities.

VOA: standard.2009.12.20

"To restore a more stable financial and economic environment, in which opportunity can again flourish and in which Americans' hard work and creativity can receive their proper rewards,".

VOA: standard.2009.08.25

"We are working hard toward an agreement. It is clear we have the major elements of an agreement in place and now we have to do the hard work of conforming the treaty and some other small negotiations,".

VOA: standard.2010.02.03