Senior Administrator for Cluff Gold,Clifford Patnelli, says mining for gold in the hard rock will be a first for Sierra Leone.

VOA: standard.2010.04.22

For example, imagine-- this shouldn't be hard for most of you-- imagine that you are an evil git, but you know that the person you're playing against is an indignant angel.

比如,你们把自己想象成饭桶恶魔,这对你们来说不难,但是你知道你的对手是个愤怒天使

耶鲁公开课 - 博弈论课程节选

If somewhere later on in the code it shifts to string, I might not be manipulating that and getting actual values out, but not what I wanted, and it's going to be really hard for me to chase it back.

然后后面的一些代码,把变量类型变为了字符串，我可能不会通过实际操作,去取得实际的变量的类型，但是这并不是我想要的类型,而且对我来说把类型，变回去也很困难。

麻省理工公开课 - 计算机科学及编程导论课程节选

It is an ideological arrangement. But PDVSA suffers, because it could be selling that oil to the United States for hard currency."

VOA: standard.2010.08.06

We want to be loved for our hard work, and we're all working really hard here.

我们想因为努力工作受到喜爱，我们因此工作的很卖力。

耶鲁公开课 - 弥尔顿课程节选

"It is very hard to be a beacon for others, when you are constantly at war.

VOA: standard.2010.03.11

It's sometimes hard for me, but I trust that you will be able to do that.

有时会有点困难，但我相信你们能做到。

耶鲁公开课 - 1945年后的美国小说课程节选

It is not an easy task,she said. "This is going to be a very hard act for him to pursue, particularly when there is very, very deep hostility to the United States and to the West more generally in Pakistan."

VOA: standard.2010.08.06

Now it could be that you're hungry but you're working hard, and so you may not get your food for an hour until after you're hungry.

现在你很饿,但是你必须努力工作,直到一小时后才能吃东西

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

"But they've had to back away from that, because any Karzai fault is something that really can be linked very much to the failure of the United States to press very hard for greater transparency, greater accountability, and to also put in place institutions that are responsive to the Afghan people."

VOA: standard.2009.08.03

The barriers to unity presented by European geography and very limited technology made it hard for a would-be conqueror to create a vast empire, eliminating competitors and imposing his will over vast areas.

由于欧洲独特的地理条件,和当时有限的科技水平,使未来的征伐者很难建立一个广袤的帝国,清除异己和使他的意志,传播到广袤领地的每一个角落

耶鲁公开课 - 古希腊历史简介课程节选