It used to be believed, and it's the sort of thing I would-- when I taught this course many years ago I would lecture on-- that neurons do not grow back once you lose them.

人们曾经相信,我在很多年前,教授这门课的时候,会告诉大家,一旦你的神经元受损,它们便无法恢复

耶鲁公开课 - 心理学导论课程节选

Yeah, many years ago, I used to work in London.

很多年前我曾经在伦敦工作过。

我使用自行车 - SpeakingMax英语口语达人