But the hard part is finding the time.

但是有时间可不容易。

有趣的宿舍生活 - SpeakingMax英语口语达人

We are not really like pinpointing one tradition... This is the part hard to draw lines.

我们并非要一对一地认定传统。,这正是难以区分之处。

普林斯顿公开课 - 人性课程节选

I can only imagine though, at this point in the semester, what will become Milton's eventual championing of marriage is pretty hard to imagine, in part because we're just devoting our second class to a literary work given almost entirely to the virtue of chastity.

然而我只能认为，在学期的这个时候，什么将成为弥尔顿婚姻的最终捍卫者,一定难以想象，一部分是因为,我们的第二节课一直在讨论,关于贞洁的美德的作品。

耶鲁公开课 - 弥尔顿课程节选