Today,the solution to the problem is so common that it is difficult to understand that there was a problem at all.

VOA: special.2010.07.14

This is a common problem in gene therapy.

这是基因治疗中的通病

耶鲁公开课 - 生物医学工程探索课程节选

Eliot would go further and say that there is no common form of modern speech, and that's the problem.

艾略特涉及的更加深入,他认为谈话并没有什么通常的形式，而这就是问题所在。

耶鲁公开课 - 现代诗歌课程节选

The problem is especially common along the west coast of Africa and in some ports in Asia and the Pacific.

VOA: special.2009.02.10

These are going to be fairly common-sense definitions, but they're important, and when you get to a problem set, really nailing down what the system is, not more, nor less, in terms of the amount of stuff, that's part of the system, it's going to be often very crucial.

这些是,很常识性的定义，但是很重要，当你要解决问题时，务必要搞清楚系统是什么，它包含多少物质，不能多也不能少，这往往,是非常重要的。

麻省理工公开课 - 热力学与动力学课程节选

And this design reduced feedback, a noise problem common with acoustic guitars.

VOA: special.2009.09.27

Farther west, the problem is with common carp.

VOA: special.2009.12.15