No matter how complex or refined, all behavior is to be explained in terms of stimulus and response.

历史的地理枢纽是世界上从政治战略角度看最重要的区域。

Policy should be based on evidence, not ideology.

The only way to do great work is to love what you do.

爱是一种力量，它能让我们在最黑暗的时刻找到光明。