Roberto Clemente once said: "Anytime you have an opportunity to make things better and you don't, then you are wasting your time on Earth."

VOA: special.2010.04.11

PROFESSOR: So, does anyone have any questions about the set up here, does it make sense what we're looking for the bar to go back once we make some progress.

教授：所以，有人对这套装置,有疑问吗，一旦我们,取得了一些进展,我们看到这个棒又返回来。

麻省理工公开课 - 化学原理课程节选

If you make Jell-o and you make it right, then once it's set or gelled, it has mechanical properties.

如果你用正确方法做出了吉露果冻,它一旦凉下来定了型,就有了机械性能

耶鲁公开课 - 生物医学工程探索课程节选

Lena Horne once said that World War Two helped make her a star.

VOA: special.2010.05.23

but once I could see that ethics and political philosophy really could make a difference to the way we live our lives.

但是当我看到，伦理学和政治哲学,的确可以改变我们的生活方式时。

普林斯顿公开课 - 人性课程节选

Mr.Obama said once the decision is made he will make sure the American public fully understands the new war strategy and all it entails.

VOA: standard.2009.11.13

I'm walking along the list once, taking two things and saying, make sure the biggest one is next.

我遍历一次列表，每次取两个值,确认最大的元素在后面一个。

麻省理工公开课 - 计算机科学及编程导论课程节选

That's the whole thing about being a kook,I mean, being willing to be a beginner, make a fool out of oneself once in a while."

VOA: standard.2010.08.04

It fit the environment perfectly, once they could make these things actually go twenty-five miles an hour.

它与北美的环境及其契合,人们铺路速度一度可以,达到每小时25英里

耶鲁公开课 - 美国内战与重建课程节选

I will give you all development and all you have to do is every once in five years make sure you come and vote for me, and this thing will go on,"

VOA: standard.2010.02.24

And once he did that, both he and many other scientists, could then, once they understood what caused the fluorescence, make little changes to the actual protein, and tune what the properties of that fluorescent protein were.

而且一旦他做成了这个，一旦他们弄清楚了是什么导致萤光，他和其它很多科学家，就可以对蛋白质做微小的改变，调节蛋白质的荧光性质。

麻省理工公开课 - 化学原理课程节选

But,I make a commitment here that once we get to our final report, we will not shy away from making criticisms either of institutions, or processes or individuals wherever they are truly warranted,"

VOA: standard.2009.11.25

If they do make big bets maybe they get lucky once, or twice,or three times, but ultimately their luck is going to run out.

搏大了,可能会侥幸那么一次,两次或三次,但最终运气是会用完的

耶鲁公开课 - 金融市场课程节选

"Because especially when it was being said that Michael was trying to make a comeback, and people had hoped that he would live and come back once again and hit the musical scene."

VOA: standard.2009.06.26

So, once you know your schedule, then you make your arrangements.

所以，你们一知道时间表，就安排计划吧。

麻省理工公开课 - 固态化学导论课程节选

I'm going to do this thing. So,that's why I got here." Robert Nephalama,who works at a bank near Johannesburg, wants to make the tournament a once-in-a-lifetime experience for the visitors as well.

VOA: standard.2010.03.26

I never once saw him rely on polling to help him make a decision.

我从没见他依赖民意测验,帮助他做决定。

普林斯顿公开课 - 国际座谈会课程节选

Some analysts have expressed concern that holding the trial in New York City, the site of the 2001 attack on the World Trade Center, will once again make the city a prime terrorist target.

VOA: standard.2009.11.25

We'll try to make this happen only once.

我们尝试让这个发生一次。

麻省理工公开课 - 化学原理课程节选

"People can do things in their own lives, with their children, they can do work in their communities to improve it and once you take those steps, the next logical step is to make sure that your government officials are doing the right thing."

VOA: standard.2010.04.25

He says, "to succeed in many things or many times is 'difficult.' For instance, to repeat the same throw of dice 10,000 times would be impossible; whereas, to make it once or twice is comparatively easy."

他说,要成就很多事情,或成就一件事情很多次,是很困难的,比如,掷一万次骰子都得到同样的结果,是不可能的,但是,掷一两次却是相对容易的

耶鲁公开课 - 金融市场课程节选

We establish these targets, we review them once a year, we don't make changes in many years, they're quite stable, and when we do move them we don't move them by a lot.

我们设定了这些资产配置,每年都会评估一次,这些指标已经很多年没有变过了,十分稳定,即使我们要调整,也不会有很大幅度

耶鲁公开课 - 金融市场课程节选