This is the 7636th most frequent Chinese word.
转动
To rotate or turn.
Here, '转动' describes the physical act of rotation of an object, i.e., the windmill's vanes.
风车在微风中慢慢转动。
The windmill slowly rotates in the gentle breeze.
In this context, '转动' refers to the action of turning an object to achieve a functional outcome, like unscrewing.
为了拧开瓶盖，他用力转动瓶子。
To unscrew the bottle cap, he rotated the bottle with force.
This sentence employs '转动' to describe the movement of an object (the wheels) in rotational motion and its physical effect (vibration).