If you go investigate further, the guy has done 30 apps before and he has done a master's on the topic, a Ph. D. He has been working on the topic for 20 years.

如果你深入研究就发现，这个人在之前已经开发了30个应用，他有相关的硕士和博士学历， 他研究这个领域已经20年了。