And if we do, in fact, hit it with light to get the electrons off, it will go back to the straight up in position, or if it gets knocked hard enough it does that, too.

而且如果我们这么做，事实上，用光轰击它以逐出电子，它就会在原位置沿直线返回，或者如果它被撞击的足够猛烈,也会出现上述现象。

麻省理工公开课 - 化学原理课程节选

I think if you work hard enough, you can go in anywhere you want.

我觉得，只要你足够努力，你就可以去任何你想去的地方。

美国贫富差距？ - SpeakingMax英语口语达人

Why do they end up not working hard enough?

人们因为什么才会努力工作呢

耶鲁公开课 - 博弈论课程节选

Now, I think that ultimately--interestingly enough, Los Angeles had a real estate boom and bust in the 1880s; that's hard to believe.

现在,我认为这非常有意思,19世纪80年代洛杉矶经历了房地产的,繁荣和萧条,这难以置信

耶鲁公开课 - 金融市场课程节选

But this a huge agenda, and so we are working enough hard here.

然而，这是项庞大的工程，因此我们正在竭尽全力。

普林斯顿公开课 - 领导能力简介课程节选

I have left out meat and fish, of course, neither of them very common in this part of the world, but meat was common enough, because there were sheep and there were goats, even when beef would have been very hard to get.

当然我没提到肉和鱼,它们在希腊都不是很常见,但相对来说肉类已经相当常见了,因为即使在牛肉都很难搞到的时候,这里还有着绵羊和山羊

耶鲁公开课 - 古希腊历史简介课程节选

They're efficient enough that you have to work hard to find opportunities, but not perfectly.

如果你付出足够的努力,还是能发现机会,所以市场并不完全有效

耶鲁公开课 - 金融市场课程节选