我突然觉得床逆时针移动了90度并且被弹射出医院门口，最后掉进海里。

I suddenly felt as if the bed were rotated 90 degrees in a counterclockwise direction and catapulted downward toward the front of the hospital and into the sea.

youdao

其实私下里我想了很久，才找到R的这些元素来表示，怎样使其它向量逆时针旋转90度。

Secretly, I worked pretty hard to find what are the entries that would tell me how to rotate something by 90 degrees counterclockwise.

youdao

在一个平面上，做90度旋转的变换，逆时针方向。

Let's say that in the plane we look at the transformation that does rotation by 90 degrees let's say, counterclockwise.

youdao