It hosted the event. "Guns and money are flowing from the United States south and fueling this problem and drugs are traveling north" "It's a mutual responsibility between the U.S.and Mexico."

VOA: standard.2010.07.20

AIDS is a tremendous problem, deaths from HIV infection and AIDS a tremendous problem in Africa and other parts of the world.

艾滋病是一个巨大的问题,在非洲和世界其他地方,艾滋病毒感染和艾滋病带来的死亡,是一个巨大的问题

耶鲁公开课 - 生物医学工程探索课程节选

That's a big problem and so can you protect these cells that you give to the recipient from attack by the recipient's immune system?

并且至关重要,那么你们想办法保护这些植入受体的细胞,使它们免受免疫系统的排异反应么

耶鲁公开课 - 生物医学工程探索课程节选

"And the biggest problem that we heard from our economists with regard to why employers are not hiring, it is all the job-killing policies that are being offered by this administration and this Congress,".

VOA: standard.2009.12.29

When you go today and look at the homework, you'll find the problem from the textbook, one extra problem that deals with all of this.

你们今天回去看到作业,就会看到课本上的一道题目,这道附加题涵盖了所有知识点

耶鲁公开课 - 基础物理课程节选

Well, there's a problem with the argument from recycling, and it's this.

然而循环观点,有一个问题,就是说

耶鲁公开课 - 死亡课程节选

So, by the way, I don't mean this as a joke, in some sense there's always a third candidate and that comes from the problem we had earlier, because not voting is always an option.

顺便说一句,我不认为某种程度上说,是有三个选举人是一个笑话,这是由于一些由来已久的问题造成的,因为不投票也是一种选择

耶鲁公开课 - 博弈论课程节选

And this is a little different from what happened ten or so years ago, but the so-called Y2K problem was essentially the result of programmers not really having the foresight to realize, "Maybe we shouldn't use so few bits or so few digits to represent a year because eventually this will be a problem."

这个跟10年前发生的事情有点不一样,那个所谓的“Y2K“问题,本质上的结果是,程序员没有真实地预见和认识到，“可能我们没必要用到这些位数或数字,来表示一年，但是最终这个将会,是个问题“

哈佛公开课 - 计算机科学课程节选