"In a single generation, we've fallen from first place to twelfth place in college graduation rates for young adults.

VOA: special.2010.08.12

What happens is, in the course of a single generation, they develop their own language.

实际情况是,在一代人的时间里,他们创造出了属于自己的语言

耶鲁公开课 - 心理学导论课程节选