Only two areas did not have an overfishing problem in either the new study or the earlier one.

VOA: special.2009.09.08

There are problem in that a horse must be treated when we study rigid bodies.

当我们学习刚体的时候,把马看做什么就是个问题了

耶鲁公开课 - 基础物理课程节选

And that makes it for me a very exciting time to study this because the problems aren't solved in the way that bridge building is largely a solved problem now.

对于我而言,这是一个非常激动人心的时代,因为一百年前桥梁建设中难以解决的问题,在今天都得到了解决

耶鲁公开课 - 生物医学工程探索课程节选

So we work very closely with students not so much about what they want to study, but more about what problem are you trying to solve."

VOA: special.2009.09.24

What's true problem of that study?

这项研究到底揭示了什么问题？

麻省理工公开课 - 媒体、教育、市场课程节选