They discussed the difficulty of studying abroad.

他们讨论了到国外学习的困难。

《牛津词典》

It has something to do with the difficulty of the activities in question.

这与所讨论的活动的难度有关。

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The difficulty of a problem was defined in terms of how long it took to complete.

问题的难易度是以解决这个问题所花时间的长短而定的。

《牛津词典》

The cost depends on the difficulty of the subject and how soon the paper is needed.

VOA: special.2009.04.23

At times he expresses his frustration with the difficulty of his task, and resentment that it's been assigned to him.

有时，他会表达自己对这项被指派的，任务的挫败和不满。

耶鲁公开课 - 旧约导论课程节选

Another illustration of the difficulty of translating all values, in this case, a certain idea of virtue, into utilitarian terms.

这个例子再次说明,很难把所有的价值，此处特指某种德行，转换为功利主义形式。

耶鲁公开课 - 公正课程节选

The difficulty of luring tenants into such a skyscraper is only one argument against it.

FORBES: They Will Rise Again

But the differences underline the difficulty of understanding what is happening to the economy at present.

ECONOMIST: Ports in a storm | The

Even so, the vagaries in the numbers point to the difficulty of compiling accurate statistics.

NPR: Fudging the Numbers on Hate Crimes