That is a very difficult thing to say, but that is the truth.

VOA: standard.2009.12.12

However, for dietary intake, there have been fewer advances like that because it's such a difficult thing to get a hold of.

然而,对于饮食摄入量,和那些比则进步要少,因为这很难把握

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

It's a difficult thing to do these things and that's why we need invention.

做这些事很难,这正是我们需要发明的原因。

耶鲁公开课 - 金融市场课程节选

Because writing a philosophy paper is a difficult thing to learn how to do.

因为写哲学论文,是不太好学的。

耶鲁公开课 - 死亡课程节选

Some people find that a psychologically difficult thing to accept, but I've believed that pretty much all my life, so I'm quite comfortable with it.

有些人会觉得心理上,很难接受这一点，但在我的人生中，我一直相信这一点，我也坦然接受这一点。

普林斯顿公开课 - 人性课程节选

That's a complicated thing that accountants figure out and accountants find it difficult to define the earnings of a company, but they do something and they come up with a number.

会计们会计算这个复杂的问题,他们还会发现公司收益很难定义,但是他们会想办法,得出一个数字

耶鲁公开课 - 金融市场课程节选