rotor spool

例句：

1. 1. The rotor spool is the part of the engine that rotates.
   转子滑轮是发动机中旋转的部分。
2. 2.The rotor spool was designed to reduce friction and improve efficiency.
   转子滑轮的设计旨在减少摩擦并提高效率。
3. 3.The rotor spool is responsible for transmitting power from the engine to the wheels.
   转子滑轮负责将发动机的动力传递到车轮上。