He often has a special plan or answer to a problem that he can use if he needs it.

VOA: special.2010.05.02

If you've got a problem that has units associated with it, do the exercise of carrying the units through because, guess what?

如果你做到一个跟单位有关的题目，请你在做题目的时候密切注意它，因为，猜猜是什么？

麻省理工公开课 - 固态化学导论课程节选

So let's actually let you try another example of solving a problem that has to do with one of the spectrums.

下面请大家来看一下另一个例子,这次是一个需要大家解决的关于光谱的问题。

麻省理工公开课 - 化学原理课程节选

It is not only Africa, it would seem, that has a problem with access to high-cost, high-tech drugs.

ECONOMIST: Prescription drugs

Either way, Sir Mervyn noted that Greece has a solvency problem that has not yet been solved.

BBC: Why UK banks are not immune to eurozone woes

But Collins was pleased with the way his new signings settled in, with goalkeeper Yves Ma-Kalambay impressing in a position that has been a problem for Hibs.

BBC: SPORT | Football | My Club | Hibernian | No move for Murphy, says Collins