When he was four years old, he got eyeglasses to correct the problem.

VOA: special.2010.05.30

One other very important thing to understand about this defensive problem and this is one of the debatable issues between the old guard and the traditional interpretation; I'm still giving you the traditional view.

对于防御的问题还有另外一个很重要的因素,这也是老顽固们对传统观点,争论的一个话题,我还是采用传统观点的说法

耶鲁公开课 - 古希腊历史简介课程节选

An old problem is getting new attention in the United States: bullying.

VOA: special.2010.04.22

But his mother's claim that he is a 16-year-old juvenile could pose a problem for prosecutors seeking the maximum sentence of life imprisonment.

VOA: standard.2009.04.22

"It is an age-old problem in politics, where in general in American politics, the candidate who appeals most to the most fervent members of the party wins the primary and then often has a very difficult time appealing to the broader electorate."

VOA: standard.2010.05.19