"The cost of solar has been dropping on average about 30 percent a year, where the cost of traditional energies has been going up exponentially because the price of fossil fuels is going up,".

VOA: standard.2009.10.27

I could get a really big upper bound, this thing grows exponentially.

那么我可以得出一个相当大的上界，我们可以给一个指数级增长的上限。

麻省理工公开课 - 计算机科学及编程导论课程节选

Researchers and scientists have been able to improve quality of life recently exponentially

研究者和科学家能够大幅度提高人类的生活质量，

需要动物实验吗？ - SpeakingMax英语口语达人

But this thing grows exponentially.

但是这种增长是指数性的。

麻省理工公开课 - 计算机科学及编程导论课程节选

Change happens exponentially.

改变以指数级发生。

哈佛公开课 - 幸福课课程节选