But you can't yet be in it yet, because when people write to us and ask how they get in the book, we sent back a postcard saying: drop dead.

但我们还不能为现在的人撰写传记，有时人们会给我们写信,问怎么样才能纳入传记中，我们就寄回明信片，上面写着，活人无资格。

普林斯顿公开课 - 人性课程节选

When you vary time a little bit and ask, "How does R change?"

当你把时间改变一个微元,然后问,"位矢 R 会怎样变化"

耶鲁公开课 - 基础物理课程节选