Astronauts on the next flight, Gemini Five, suffered a number of technical problems.

VOA: special.2009.07.01

Maybe there are a number of structural problems that prevent them from doing that ... and they think, maybe, that-- I think Norway may be moving that way, so we'll see in the future.

也许在结构上存在不少问题,导致他们无法做到那一点,而且他们觉得，也许-,我认为挪威会向那个方向努力的，让我们拭目以待吧。

耶鲁公开课 - 金融市场课程节选

"One of the programming problems was try to figure out how to break an arbitrary chocolate bar into a certain number of pieces of a certain number of sizes and to do it as quickly as possible.

VOA: special.2010.03.11

Toyota's problems come amid a growing number of complaints, accidents,recalls and financial problems for several leading Japanese companies.

VOA: standard.2010.02.15

Doctors rarely see these conditions. But studies have linked vitamin D deficiency to a number of serious health problems, including heart disease, several types of cancer, osteoporosis,diabetes, Alzheimer's disease and some autoimmune disorders.

VOA: standard.2010.05.28