translation.en: And I spent countless hours in presidential libraries trying to understand how the environment had shaped the leaders, the moves that they made, and then the impact of those moves beyond their tenure.
translation.zh: 我在总统图书馆内度过了无数个小时， 试图了解环境是如何 塑造领导者的， 他们的行动， 以及这些行动造成的 超越他们的任期的影响。