Unity was difficult. Being somewhat isolated, the inhabitants of each region developed a distinctive economic and cultural character.

团结很困难，它有一点孤立，每一个地域的居民都发展起来,有了各自经济文化特点。

耶鲁公开课 - 旧约导论课程节选

Isn't it difficult being a mother and a professor at the same time and keeping a balance between the two?

同时做母亲和教授是不是很困难呢？两者之间取得平衡不容易吧？

教授的梦想 - SpeakingMax英语口语达人

Whether it gets outweighed easily, or whether it's very, very difficult and the contents have to be horrible to outweigh it, depends on how much value you think being alive per se has.

不管是轻易被超越，还是它很困难被超越,还是生活内容要非常糟糕才能超越它，这取决于你认为生活本身有多少价值。

耶鲁公开课 - 死亡课程节选