他专注于两个专业领域：心理学和应用数学。

He has two concentration areas in Psychology and Applied Mathematics.

youdao

这是一个大量数据和应用数学取代其他工具的世界。

This is a world where massive amounts of data and applied mathematics replace every other tool that might be brought to bear.

youdao

我应该会在2010年毕业。我的研究领域包括：数据库、数据挖掘、安全、社会网络、互联网应用以及数学和其他。

My research areas include, but are not limited to, databases, data mining, security, social networks, Internet applications and some mathematics.

youdao

At the end of the day, I wound up starting in Math and Physics at Harvard, finishing an Applied Math and Economics and doing business.

最后，我跑去哈佛学了数学和物理，念完了应用数学和经济，跑去经商了。

斯坦福公开课 - 微软CEO-Steve.Ballmer谈科技的未来课程节选