internal gear pair

例句：

1. 1. The internal gear pair is responsible for transmitting power from the engine to the wheels.
   内部齿轮对负责将发动机的动力传递到车轮。
2. 2.In a car, the internal gear pair is crucial for smooth operation of the transmission.
   在汽车中，内部齿轮对对于变速箱的平稳运行至关重要。
3. 3. The engineers were tasked with designing an internal gear pair that would improve fuel efficiency.
   工程师们被委托设计一种内部齿轮对，以提高燃油效率。