"When we are on the ground, surrounded by shapeless gas; When you are in the water, you are surrounded by a liquid that has no shape in size. When you want to move, a gas or liquid will block your progress, and that's resistance. Gases and liquids are divided into two states: stationary and flowing. When the gas flows, it forms the 'wind' that everyone knows, and when the flowing gas moves, moving in the direction of the wind is a tailwind, and vice versa, it is a headwind, and the same principle is true for liquids, which are divided into ...... and

For many scientific and technological terms, there are professional explanations in modern times, but if the original words of modern explanations are spoken, it is difficult for people in this era to understand, and Zhao Xie explained them in the most popular way.

Huang Tingjing listened attentively to Zhao Xie's explanation, and his brain received the knowledge that "Haotian God taught to King Zhao".

"When the air is not moving, it is a windless state, and there will also be resistance, and the faster it moves, the greater the resistance......"

In terms of science and technology, Huang Tingjing has a very strong desire for knowledge, and King Zhao's explanation to his second disciple last time and to himself this time has opened up a new world for his understanding of all things in the world.

"May I ask the king, why are there four seasons of spring, summer, autumn and winter? Why does the sun come out of the east and set in the west? ”

The five questions asked by the second disciple last time, Zhao Xie did not answer them at that time, and now Huang Tingjing wants to ask them one by one.

In ancient society, "the sky is round and the place is round" is people's perception of the universe, and for these problems, we must first overturn the theory of "the sky is round and the place is round" that has been popular in ancient times.

Zhao Xie asked rhetorically: "Mr. Huang, do you think that the sky is round and the earth is square?" ”

Huang Tingjing didn't have time to think about it: "That's nature, this is known to the world!" Then he became puzzled, and King Zhao asked, isn't the earth in the world a round place?

I only heard Zhao Xie say: "This is a mistake, a huge mistake!" God Haotian told me that the sun and the moon are all round, and the earth under heaven is not square, but also round, and the place where we are is called 'earth'. The fact that the sky is round is nonsense, but only a façade that can be seen with the naked eye. ”

As soon as these words came out, Huang Tingjing was extremely shocked, oh my God! How can it be round? The fact that we have the earth under our feet completely subverts his perception.

Zhao Xie said: "Mr. Huang, please take a look!" Then he spread out a large piece of paper on the desk and drew it with a pen.

First, draw a circle, the text marks the sun, then draw the earth and the moon, then draw a large circle around the sun, representing the orbit around the sun, and then draw a circle around the earth, representing the moon's orbit around the earth.

Huang Tingjing got up and approached, staring at every stroke of King Zhao on the paper.

After the painting was finished, Huang Tingjing looked at it in a daze, although he marked the positions of the sun, the earth, and the moon, but he couldn't understand it.

"The sun is a huge ball that burns with fire, and the light emitted by the burning sun shines on the earth, so that the earth can have sunlight and warmth. The earth revolves around the sun in an orbit, which is called 'revolution', and the earth itself is also rotating, which is called 'autobiography'. When we are in the position of the earth facing the sun, it is daytime, when we are facing away from the sun, it is night, the earth is autobiography from west to east, because the east is first illuminated by the sun, so we see the sun coming out of the east......"

Zhao Xie answered Huang Tingjing's questions in detail in the most popular language, sometimes pointing to the drawings.

In order to explain more vividly, Zhao Xie ordered people to take three balls used in Keju, representing the sun, the earth, and the moon, and simulated the rotation and rotation of the earth.

At this time, Huang Tingjing was completely immersed in the ocean of knowledge, listening attentively to Zhao Xie's explanation, which subverted the truth of human cognition and kept him in shock.

When Zhao Xie finished explaining, Huang Tingjing still stood in place in a daze, as an ancient person, it takes a process to receive and digest this shocking new knowledge.

Zhao Xie was not in a hurry, and sat on the ground and drank a sip of hot tea.

New knowledge echoed in Huang Tingjing's mind, and at this moment, it occupied all the space in his brain, and when the palace maid came in to add tea, he didn't know it.

After receiving new knowledge, new questions arise in the brain.

Zhao Xie is not in a hurry, the more the other party is fascinated and intoxicated, the more he can be bound by himself.

After a while, Huang Tingjing would finally come back to his senses and throw out a series of questions.

"The grass people ask the king, where on the earth are we are? Why do all the cold winds blow from the north? ”

Zhao Xie then drew on the large piece of paper, drew the seven continents and the four oceans, and then drew the land of China based on the territory of the Qin Dynasty, and circled a small circle in the northeast of the land of China to indicate the location of the Zhao state.

Then, the excess of the square paper is cut out and a picture is rolled into a ball-like shape.

"We're in this location! I just told you why there are spring, summer, autumn and winter, and the closer you get to ......"

Zhao Xie explained again, roughly drawing the cold zone, temperate zone, and tropical, pointing out the climate conditions in various places, the Arctic and Antarctic climates are the coldest, saying the natural phenomenon of "cold air", pointing out that in the northern hemisphere where the land of China is located, cold air is formed in the north of Bisai in winter, and when the cold air goes south, it brings cold, rain, rain and snow to the place where it goes.

Listening to King Zhao's explanation, Huang Tingjing thought about the situation in the past winter again, and sure enough, this was the case.

"The grass people ask the king, how did the 'cloud' appear? Why are they divided into 'dark clouds' and 'white clouds', and why do clouds rain? How big is the sun? What is it burned with? ”

Huang Tingjing's questions continue to arise, and today is the day he has gained the most on the road of knowledge search, and it is the most exciting day in his life.

The other party has been immersed in it, and he can't stop, Zhao Xie's goal has been achieved, and it's time to stop.

"Mr. Huang, thanks to the guidance of Haotian God, the widow is fortunate to know this kind of knowledge and truth, your questions are too many, and the widow has not had time to ask Haotian God in his dream. In the past, I had a lot of doubts, when I was lucky, I could see Haotian God in my dreams, and I would ask Haotian God in my dreams when I thought about the questions during the day, and as long as I was asked, he would answer them. However, when you can dream of immortals, this is not something that a few people can control. It's better to be like this, Mr. Huang, you stay in Zhao Kingdom, if you have any doubts about your skills, you just ask, as long as you are lucky enough to dream of Haotian God pointing out the maze to the widow, the widow will tell you as soon as possible. ”

This is Zhao Xie's way of keeping Huang Tingjing, anyway, when to answer the other party's questions and what questions to answer, he is in control, and he says a little bit every once in a while.

Unless Huang Tingjing doesn't want to learn new knowledge, how can he be willing to leave.

When he heard King Zhao say that the immortals had not yet informed him, Huang Tingjing felt a little lost, but he was full of hope, and he could continue to solve his doubts through King Zhao in the future, even if King Zhao did not propose it, he would take the initiative to ask to stay.

"That being the case, the grass people will stay in Xiangguo for the time being, and they will inevitably disturb the king in the future!"

"Mr. Huang, you are a great talent, with superb skills, and you still hope that you can serve Zhao Guo!"

After talking for a long time, only this sentence is Zhao Xie's ultimate goal.