rear pump driving gear

例句：

1. 1.The rear pump driving gear is essential for the engine to function properly.
   后置泵驱动齿轮对于发动机的正常运转至关重要。
2. 2. The rear pump driving gear was designed to improve fuel efficiency.
   后置泵驱动齿轮被设计用来提高燃油效率。
3. 3. The rear pump driving gear was replaced after a few months of use, as it had worn out.
   使用几个月后，后置泵驱动齿轮被更换了，因为它已经磨损了。