机械师检查了飞机的发动机部件。

The mechanic inspected the aircraft's engine ___part.

长途驾驶时携带备用零件是明智的。

It's wise to carry spare ___parts when driving long distances.

多亏了我们带的备用零件，汽车很快修好了。

Thanks to the spare ___parts we had, the car was quickly repaired.