Even if everyone did jump that high, and the ground were rigid and responded instantly, the Earth would still only be pushed down by less than an atom's width. Next, everyone falls back to the ground.

即使每个人都跳得那么高，即使地球是刚体并能瞬时做出响应，它也只会被向下推不到个原子宽度的距离。接下来所有人都落到了地。

We just turned off into paradise.

刚体会了天堂般的快。

Geometrically, a four-dimensional creature would be able to look at those two perpendicular rotations that I just described and understand that they lock you into one and only one rigid motion for the hypersphere.

从几何，个四维生物能够观察到刚才描述的两个垂直旋转，并理解它将你锁定在个且仅有个刚体运动中，对于超球体来说是这样。

The study of gases was originally quite distinct from that of rigid bodies, and would never have advanced to its present state if it had not been independently pursued.

对气体的研究最初与对刚体的研究截然不同， 如果不是独立进行， 就永远不会发展到现在的状态。

Of course, from our perspective, we know this is all just rigid motion.

当然，从的角度来看，这只不过是刚体运动。

Nowadays both the gas and the rigid body are manufactured out of a more primitive and universal kind of matter.

如今，气体和刚体都是由种更原始​​、更普遍的物质制成的。

The correspond to rigid motion, with no stretching, squishing or morphing.

它对应于刚体运动，没有拉伸、压缩或变形。