So it's very difficult, but what I come down to is that you just have to place your energy on your breath, and every time you notice your awareness drifts to somewhere else, you have to recognize this drift and let it go.

因此这很难，但我总结的方法是,只需要把能量集中到呼吸上，每次注意力不集中,飘到别处时，要意识到意识的涣散，并放手不管。

普林斯顿公开课 - 人性课程节选

If I can just have it there before me, that is a very difficult and derivative intellectual act, and it cannot be understood as primordial or primitive.

仅是面对着它，对于思维来说非常困难，并且这不能被理解为是原始的。

耶鲁公开课 - 文学理论导论课程节选

So, he's using intuitive-- he says difficult or easy-- so he says it's difficult, meaning the probability is very low, or easy, meaning that probability is high.

所以他直接进行了描述,他用的是困难和简单两词,他说的困难,意思就是概率很小,他说的简单,意思就是概率很大

耶鲁公开课 - 金融市场课程节选

So if you're trying to make a more complicated organic molecule carbon-carbon bonds are one of the most difficult things to make in organic chemistry, and it turns out that c n minus is a very reactive molecule, so it's a good way, even though we'll go over some drawbacks in a second, it is a good way to make carbon-carbon bonds.

如果你要合成一个更复杂的有机分子,碳碳键是有机化学中,最难制造的键之一，而实际上氰离子是一种具有很高活性的分子，用它是一个好办法，尽管我们一会儿将看到它的一些缺点，但它的确是一个制造碳碳键的好方法。

麻省理工公开课 - 化学原理课程节选

It is in fact a very, very difficult and derivative act of the mind to try to forget that I am looking at a sign that says 'exit' and, in fact, just looking at what is there without knowing what it is.

事实上，试图忘记那个写着存在的标志,和只知道它存在而不知道它是什么，是非常难的事情。

耶鲁公开课 - 文学理论导论课程节选