Not once did I question this fact. My mind told me I was on Mars as your mind tells you that you are upon Earth.

VOA: special.2010.07.10

I told you once you know the free parameters, R0 and v0, you know everything about the future of the object.

一旦给定自由参量 R0 和 v0,你就能知道这个物体之后的运动状态

耶鲁公开课 - 基础物理课程节选

"We can't only listen once. We've got to listen twice because sometimes when the stories are told, you hear something and you learn something.

VOA: standard.2010.02.19