To keep himself awake as he flew east during the long night, Post tied a piece of string to one finger.

VOA: special.2009.03.18

So the president spent lot of his time not just to keep himself infromed.

因此总统会花很多的时间,不仅仅使他自己信息灵通。

普林斯顿公开课 - 国际座谈会课程节选