Motor cars and green cars
A green-skinned train slowly moved forward on the track.
On the track not far from him, a silver-white train whizzed past, disappearing at the end of the track in the blink of an eye.
Looking at the speeding train, the green car said suspiciously: "It's incredible, I'm about the same length as this train, and the size is not much different. It looks like the color is different, but why is he running so fast, but I'm slow like an old cow pulling the car?"
No one heard and no one answered his questions.
Days passed by on the run.
On this day, the green car and the high-speed train met at the station. They both stopped operating for maintenance. The green car raised his doubts again and asked the high-speed train: "Hey - man, there is something I have never understood. You and I are also trains. Why can you run so fast, but I can't?"
The bullet train said: "The reason is very simple. When your green leather car runs, the power is all on the front of the car, that is, you rely on the front of the car to pull other carriages forward. One person in the front of the car sweats vigorously, while others sit back and enjoy the success. This is what people often say. 'The train runs fast, and it all depends on the front belt'; but our bullet train is not the same. We are a new-style train. Not only does the front of the car have its own driving force, but each car has its own power. Drive yourself, and everyone works together. No one wants to be lazy and slip, twist into a rope, and run forward in the same direction. The speed will naturally be faster."
The green car heard "Oh", and he suddenly realized that he sighed long and long: "After listening to you, I understand that the strength of the front of the car alone is far stronger than the combined strength of the team. Our green car should really retire!"
"No, although your green car is slow, you are the most suitable travel assistant for those who like a slow life." EMU said.
"Really? As long as there are still people who need it, I will continue to serve humanity." The green cart said happily and firmly.
"Let's go, buddy!"
"Okay, let's go!"
The green car and the moving car greeted each other, swishing and rumbling, each rushing to their own journey.