connecting part

例句：

1. 1. The car's engine is a crucial connecting part of the vehicle.
   汽车的发动机是车辆的关键连接部件。
2. 2.The new design incorporates many connecting parts to improve efficiency.
   新设计包含了许多连接部件，以提高效率。
3. 3. The bridge connects two cities and provides a vital connecting part for transportation.
   这座桥连接了两个城市，对交通起着至关重要的连接作用。