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

如果你扔一个不的足球，它会遵循类似的轨迹，但不会翻倒。

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

梯子不，所以力矩的 用于它的等于零。

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

但就像一个不的黑洞一样，它只是由中间某个位置的奇点义的。

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

在物体不运动的情况下，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）（3）在不考变形矢量的情况下，隧道结构的变形矢量表示为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的黑洞，因为宇宙中的一切都在以某种方式。

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， 比如你必须控制阳光， 因为你不在一个的地球上，明白吗？ 你会不停地绕着它。

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而设计的 但让球或不取决于你的手在做什么 或用球拍或球棒 或任何你用来移动球的东西。