As a result, they were not prepared for all the work and caused environmental problems.

VOA: special.2009.06.30

The problems that Frost's poetry poses for us as readers are not problems of reference. They can't be solved by footnotes.

他的诗歌给我们的困难,不是参考的问题，它们不能就用脚注解决。

耶鲁公开课 - 现代诗歌课程节选

As I said, they were officially recognized by the Romans, but this caused problems for Jews sometimes.

我刚才说过，他们是被罗马官方认可的，但这有时候也会给他们带来麻烦。

耶鲁公开课 - 新约课程节选

"It is crucial that national authorities do not rush to give information on source of infection which is not proven by bacteriological analysis, as this spreads unjustified fears in the population all over Europe, and creates problems for our food producers selling products in the EU and outside of the EU."

VOA: special.2011.06.10

Because nutrition is going to be one of the big problems of your generation; how to have enough nutritious food for the population as it grows.

因为营养,对你们这一代人是个大问题,怎样才能确保食物的质和量,能够满足日益增长人口的需求

耶鲁公开课 - 生物医学工程探索课程节选

Clark sees traffic congestion as one of the most serious problems of our time - for a variety of reasons.

VOA: standard.2010.07.26

So if I post it on Wednesday to cover the material for that week, then you should attempt it as quickly as possible because I'm going to assume you have done the problems when you come for the next few lectures.

如果我周三布置了关于该周课堂内容的作业,你们应该尽快着手去做,因为当你下周来上新课时,我会假设大家都已经把上周题目做完了

耶鲁公开课 - 基础物理课程节选

The final preliminary numbers have been held up because of what the government-run Independent Election Commission describes as "technical problems" with the official forms for the remaining untabulated two percent of ballot boxes.

VOA: standard.2009.09.15

After an urgent meeting in Cairo, more than a dozen Arab health ministers agreed to prevent young and elderly Hajj candidates, as well as those with health problems, from traveling to Saudi Arabia for the annual event.

VOA: standard.2009.07.23