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，它会遵循轨迹，但不会翻倒。

I don't research the spinning of plates.

我不研究盘子旋转。

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

在体不旋转情况下，所有这些 能用于平移。

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。

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 或任何你用来移球东西。