"I think we're on a very good path to making a sea-change in our missile defense posture within the coming three-to-five years."

VOA: standard.2010.03.26

I think even if you're in a chair, and you're sitting up straight with good posture, maybe hands on knees.

哪怕只是坐在椅子上，坐直并保持良好姿势，也许双手放在两膝上。

普林斯顿公开课 - 人性课程节选