A few people continued along the road to the former colonel

They had already walked for a long time, and the pace of walking was not slow, so the place where they had first set up camp and rested was already far from the exit.

After the bugs came, although they ran back some distance, they were not very fast, so they did not leave very far.

As they continued their way back, there were already dead insect corpses, shattered carapaces.

Chang Fa picked up a few carapaces and looked at them, the shell of this insect was very hard, a bit like hard plastic, slightly elastic.

The teeth of the insect are harder, as if they are broken glass, and when Chang Fa touches it lightly, he feels that his fingers are cracked.

"Fat man, have you ever heard of a meat grinder?" Chang Fa gently touched the insect teeth in his hand and asked the fat man playfully.

"Meat grinder?" the fat man was stunned.

He can understand a little bit if he wants to grind meat, but he is a little confused when he adds a word.

We can all understand these now, what meat grinders, dough sheeters, excavators, mobile phones. But a hundred years ago, none of these things existed.

Many of them are even unthinkable.

If you tell everyone now that there will be a thing in the future, people who are thousands of miles apart, can connect with each other through this thing, hear each other's voices, and meet each other, everyone will definitely think that he is crazy.

Therefore, the historical development of human science and technology is still extremely short, and in just one hundred years, it has gone from the embryonic state of science and technology to the current information age.

Chang Fa took the two rows of teeth of the insect, lifted it up to the fat man's eyes, and controlled it to open and close twice with his hands.

"If you have dozens of these tooth combinations, fit them together, somehow get them moving, put the meat in it and you can grind it into a meat filling. ”

Chang Fa used this tooth as a model and told the fat man how the meat grinder worked.

The fat man was stunned when he heard it, but Chang Fa became more and more excited the more he spoke. He felt that it was necessary for him to tell them the basics he had learned, and if someone could understand them, maybe the development of technology would be much faster.

"Have you ever heard of a chiller, it's the kind of machine that freezes ice in the summer? ”

After talking about the meat grinder, he began to talk to the fat man about the refrigerator, that is, the principle of the refrigerator.

"The principle of the refrigerator has to mention a heating machine, that is, a heat engine.

The basic principle of the heat engine is the Carnot cycle, which obtains heat from low temperatures through heat exchange in the internal and external environment. ”

Chang Fa gestured with his hands and explained to the fat man the main process of the Carnot cycle, and then explained to him that if this cycle is reversed, it will become the process of the refrigerator, and the refrigerator can be made.

The fat man rolled his eyes and looked at Chang Fa, his face full of doubts.

What kind of refrigerator, what kind of refrigeration mechanism heat engine, and what kind of cycle, he really couldn't understand, looking at Chang Fa's eyebrows flying, the fat man was being helped by Chang Fa all the way, and he was really embarrassed to interrupt.

I just listened quietly.

It wasn't until Changfa was a little tired and asked the fat man for water that he stopped.

"Drink, brother, after drinking a little talk, there is not much water, and we don't know how long we will have to walk. ”

The fat man handed over his hose and sighed.

He used to think that he was more capable, but now he found that he was still much worse than Chang Fa, and his words were still in the vernacular, and he kept talking, and what came out of Chang Fa's mouth was all strange things.

What a three-door refrigerator, a 55-inch TV, a fully automatic washing machine, a two-stroke cylinder, a 250 motorcycle......

Chang Fa talked about this for more than two hours.

During this period, although the fat man listened impatiently, Li Jiao kept his ears sideways and paid careful attention.

He felt that these things that were often issued were not fabricated out of thin air, and they all had some practical significance.

Because Chang Fa spoke in too much detail, the words before and after could be next to each other, and there was no flaw at all, so that he was absolutely made up.

Li Jiao's ability to remember details is still very strong, which is also something he is usually proud of, so after hearing these things that are often published, he directly began to analyze.

And since there is no mistake in my own analysis, it represents two possibilities, one is that the details made up by Changfa are handled very well, and I can't find flaws at all, and the second is that Changfa is true.

Li Fake is also more inclined to the second possibility.

But if you think about it carefully, what is often posted is true, then the world he described is too powerful.

The thing called the TV, which can see people, the thing called the refrigerator, which can freeze water into ice cubes under very hot air, and the thing called the tractor, which can be five or six thousand pounds, can hold many mules.

And these principles are basically powered by an energy source called electricity, and the method of generating electricity is often explained to him.

In fact, electricity has been available in this era, and although Li Jiao has not yet enjoyed these conveniences, as a member of a big family, he has heard of it.

It's just that he never imagined that he could do so many things with one electricity.

After listening to Chang Fa's narration, the fat man didn't mean to be curious at all, and he didn't interrupt out of gratitude, but after Li Jiao listened to it, he immediately had a lot of ideas.

He was a few steps behind, and after Chang Fa drank the water and handed the kettle to the fat man, he walked to Chang Fa's side.

"Brother Chang, tell me how electricity is made. Li said politely.

So in the next time, Chang Fa and Li Jiao chatted a lot of common sense about the future society.

In fact, common sense is not very appropriate, in the future society, can understand the principle of heat engine, Carnot cycle, generally college students, science and engineering college students, or better study college students.

If you don't believe me, you can go to a random college student on the street and ask.

If you are a liberal arts student, you basically don't understand these things, and if you are a science and engineering student and your academic performance is not good, you may not know what the Carnot cycle is.

While chatting, the two walked inside, calculating the time, they had already walked for almost half of the time, and the distance they had walked on the ground had already reached a certain amount.

While on the ground, a few people stopped to eat something, so it should be very close to the destination now.

Zhang Yancheng walked in front, waved his hand lightly to the two people behind him, and said, "Don't talk yet." ”

So Chang Fa stopped communicating with Li Jiao.

Zhang Yancheng walked in front, listening to the movement and walking inside.