Hurricanes have both a counter clockwise rotation at one level, we call this cyclonic spin and at another level they have a clockwise rotation, known as anti-cyclonic spin.

飓风既在一个层面上是逆时针旋转的，我们称之为气旋旋转，同时在另一个层面上，它又是顺时针旋转，称为反气旋旋转。

This is an extreme case of clockwise rotation and is suggestive of extensive anterior myocardial infarction.

这是顺时针旋转的极端情况，提示广泛的前壁心肌梗死。

If any of that feels uneasy, consider some linear transformation, like a 90 degree counter clockwise rotation.

如果你觉得不舒服 可以考虑一些线性变换 比如逆时针旋转90度。

Clockwise rotation is more commonly associated with cardiovascular diseases while counter-clockwise rotation is more common in healthy individuals.

顺时针旋转更常见于心血管疾病，而逆时针旋转则更常见于健康人。

E.g., if a was a counterclockwise rotation by 90 degrees, then the inverse of a would be a clockwise rotation by 90 degrees.

例如 如果a是逆时针旋转90度 那么a的倒数就是顺时针旋转90度。