steering knuckle king pin lower bearing

例句：

1. 1. The car's steering knuckle is worn out, which affects the steering performance.
   汽车的转向关节磨损，影响转向性能。
2. 2. The new design of the car's steering pin has greatly improved its stability.
   汽车新设计的转向销大大提高了其稳定性。
3. 3. The lower bearing in the engine needs to be replaced as soon as possible to avoid further damage.
   发动机中的下轴承需要尽快更换，以避免进一步损坏。