Just as we cannot be friends with all persons, so the city cannot be friends with all other cities or the state with all other states.

就像我们不能与所有的人做朋友，城市间也不行,国与国之间更不用说。

耶鲁公开课 - 政治哲学导论课程节选

He's just insisting that we cannot understand writing to be derivative.

他只是想说明我们不能将书写理解成为衍生物。

耶鲁公开课 - 文学理论导论课程节选

People who hold constrained vision of human nature, believe that human nature cannot be changed; it's immutable-- we have certain instincts, we have certain inclinations.

认为人性受约束的观点的人，相信人性无法改变;,它是永恒的，我们有一些本能，有一些欲望。

哈佛公开课 - 幸福课课程节选

The videos, unfortunately, cannot be made available before. We tried.

可惜视频不能提前提供，我们试了。

哈佛公开课 - 幸福课课程节选