bottom connecting rod

例句：

1. 1. The car's bottom connectingrod is worn out.
   这辆车的底连杆磨损了。
2. 2. The mechanic replaced thebottom connecting rod with a new one.
   机械师用一个新的底连杆替换了旧的。
3. 3. The engineer inspected the bottomconnecting rod for any signs of wear.
   工程师检查底连杆是否有磨损的迹象。