But another problem takes place under the sea and often gets less attention: fish piracy.

VOA: special.2009.02.10

Now, the strategy here is pretty clear. As often is for the continuous problem. What's the strategy? I pour in the gold till I run out of gold.

现在我们的战略已经很明显了,对连续性问题战略是怎么样的？,我先把所有金子,装进去。

麻省理工公开课 - 计算机科学及编程导论课程节选

They often kill the cells that they infect, and that's a problem with viruses.

它们经常杀死被感染的细胞,这是病毒的一大危害

耶鲁公开课 - 生物医学工程探索课程节选

California state senator Gloria Romero says the problem with that was asbestos which is often found in the rock.

VOA: standard.2010.07.26

Johnson says this kind of inaccurate word choice is happening so often now that she devotes a section of her class to the problem.

VOA: standard.2010.01.16

The problem? It often takes more than two months to diagnose MDR-TB.

VOA: standard.2010.07.12