One of the great discoveries in television and movies was the invention of the laugh track.

电视界和电影界一个很有趣的发现就是,发明了笑声音轨。

耶鲁公开课 - 心理学导论课程节选

This invention of social security is well over one hundred years old, but I think that, because of the rapid advance of information technology, we're going to see a lot more progress.

社会保障的这种发明,已经经过了一百多年，但我觉得,由于信息技术的飞速发展，我们将会看到许多的进步。

耶鲁公开课 - 金融市场课程节选