If you throw a football without it spinning, it would follow a similar trajectory, but it wouldn't tip over.

如果你扔一个不旋转足球，它会遵循类似，但不会翻倒。

The ladder isn't rotating, so any torques on it have to add up to zero.

梯子不旋转，所以力矩总和 应用于它旋转等于零。

But like one that's not spinning, say, it's just defined by there's a singularity somewhere in the middle.

但就像一个不旋转黑洞一样，它只是由中间某个位置奇点义。

In the case of objects that move without rotating, all of that kinetic energy goes into translational motion.

在物体不旋转运动情况下，所有这些 动能用于平移运动。

(2) and (3), without considering the rotational deformation vector, the deformation vector of the tunnel structure is expressed as 3.

（2）和（3）在不考虑旋转变形矢量情况下，隧道结构变形矢量表示为3。

Now you may wonder if you ever get non-rotating  black holes as everything in the universe is spinning in some way.

现在你可能想知道你是否曾经得到过不旋转黑洞，因为宇宙中一切都在以某种方式旋转。

And so the space environment can be thought of as zero G and or regular G, but then other phenomenon, like you have to control the sunlight because you're not on a rotating Earth, you know, so.

因此，太空环境可以被视为零重力或常规重力，但还有其他现象需要考虑， 比如你必须控制阳光， 因为你不在一个旋转地球上，明白吗？ 你会不停地绕着它转。

Some are designed for spinning like a football, but making the ball spin or not spin depends on what you're doing with your hand, or a racket or a bat, or whatever it is you're using to move the ball.

有些是为了像足球一样旋转而设计 但让球旋转或不旋转取决于你手在做什么 或用球拍或球棒 或任何你用来移动球东西。