"Basic physics: if I could get in front of him and let him hit me, the delta difference in speed would just be a few miles an hour, and we could slow down together," Innes explained.

“基础物理：如果我能够跑到它前面，让它撞向我，速度差将只有每小时数英里，我们可以一起减速，”Innes解释道。

youdao

Physics of solids I provides an introduction to the basic concepts of the quantum theory of solids. This website features comprehensive problem sets.

固态物理提供一个固态量子理论的基本观念的简介。本网页提供了相当深入的作业习题。

youdao

For those of you who are not from MIT, - all MIT students have to take two semesters of physics all undergraduate students. For most students this is the most rigorous exposure to physics they've ever had In the first semester of physics, they study what I think was the basic nonunion mechanics.

如果你们不是麻省理工的学生，要知道麻省理工的所有学生,所有本科生---都得学两个学期的物理,对大多数学生来说,这是他们接受的最严格的物理学习,第一个学期他们学一些,基础力学。

麻省理工公开课 - 媒体、教育、市场课程节选

"I already have a masters degree in physics and astrophysics a PhD in astronomy, I'm a scuba diver, I speak basic beginner's to advanced Russian, and I have flying experience, " one hopeful, Tracy Parker, tells CNN.

CNN: Middle aged spacemen needed for moonshot