She says people might have difficulty completing an activity if they cannot expect some kind of reward in return.

VOA: special.2009.09.29

Those areas that are most eager to get to the content say they may have difficulty in using it because it's not in their language or might not make sense within their culture.

那些渴望得到这些信息的地区,很可能在使用这些信息时遇到困难,因为这些信息用的不是他们的语言,或者在他们的文化里这些信息不成立。

麻省理工公开课 - 媒体、教育、市场课程节选

Sometimes when I am traveling in America, people have a difficulty understanding me.

有时候，当我在美国旅游的时候，人们要理解我，会有一点困难。

有趣的澳大利亚英语 - SpeakingMax英语口语达人

But small businesses have been hit hard by the recession and now the difficulty in getting loans.

VOA: special.2009.12.18

Why does he have this difficulty in the specificity of her prayer?

为什么在讲祷告文变得特定对她有困难呢？

耶鲁公开课 - 1945年后的美国小说课程节选

And scientists often have difficulty explaining what they do in language the public can understand.

VOA: standard.2010.05.04

We'll talk about difficulty people have in understanding what a portion is.

我们还要讲到,人们为何难以理解"每餐摄入量"的多少

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

And,he notes humanitarian organizations have great difficulty in reaching them with much needed assistance.

VOA: standard.2009.09.26