Adi naturally wouldn't give Goudan a chance to bring in reinforcements, so he rushed over like a cannonball and kicked him on the lower back, giving him a bloody kick.

"Smelly girl, you dare to hit me again..." With the experience and lessons learned from the last beating, Goudan got stage fright before the fight started. He didn't have the upper hand, but now he was even more at a disadvantage.

Adi's fists fell like raindrops, and he even didn't forget to take off his shirt and skirt and put it on a clean stone aside before taking action. He did the same thing last time, so Sister Qingyou didn't notice.

At this moment, he opened his bow from left to right, hitting the dog's balls with no power to fight back. Originally, Adi had learned boxing and kicking skills for several years in the government. In addition, during this time, he often found people to "spar" with others, and his skills became more proficient, and it was easier to fight.

More vicious.

But he didn't lose his mind, and he didn't attack the opponent's fatal places. He only picked the places that were hard to hit and particularly painful.

"You, you..." Goudan was beaten so hard that he couldn't speak. He glared at Adi angrily, with shame and fear in his eyes.

"What am I?" Adi patted the dust on his hands, feet and body, turned around and walked to the big rock, picked up his shirt and skirt and put it on slowly, turned back and glanced at him, "You mean you want to tell my sister?"

Goudan didn't say anything, that's what he thought.

"You can go ahead." Adi sneered, "But let me tell you, if you dare to go, I will beat you every time I see you, and I guarantee that the beating will be worse than this time next time. It's up to you."

After saying that, he ignored Goudan and turned around to leave. He glanced at Erxi who was hiding in the corner. Before he could raise the corner of his mouth, Erxi turned around and ran away as if he had seen a ghost. He almost fell over.

.

Adi snorted, laughed, turned around, trembled violently, then raised a big smile and ran towards Li Qingyou quickly.

"Sister, what are you doing with this stick?" Adi held Li Qingyou's arm and looked at her carefully, trying his best to hide the guilt in his eyes. I wonder if my sister saw the scene just now?

Li Qingyou really didn't see it. She went to Zhao Xiaoshan's house just now and came back with this stick.

There was a big tree outside the back wall of Zhao's house. Zhao Xiaoshan climbed up the tree and sawed off the largest branch, peeled off the bark and polished it, so it became what it is today.

"Take it back and grind it." Li Qingyou explained happily, "Archimedes once said, give me a stick and I can pry up the earth."

Give her a stick and she can pull the millstone.

"Who is Archimedes?" Adi blinked his big eyes, "What is the earth?"

Li Qingyou, "..."

How can she explain this?

"Archimedes is a great..." Li Qingyou looked at Adi's little face filled with question marks and automatically swallowed back mathematicians and physicists, otherwise he would definitely have to ask what mathematicians and physicists are again.

, this would take several days to explain and I still can’t figure it out.

And due to the limitations of the times, even if she could explain it clearly, my brother might not be able to understand it.

"He is a great man, well... he is the same person as Zhu Shijie." Li Qingyou tried his best to explain with his limited historical knowledge, but...

"Who is Zhu Shijie? What does he do?" Adi is like a curious baby. Many times what Sister Qingyou says is completely opposite to what he once knew and learned.

Just like Sister Qingyou said that the earth is round and a big ball, so it is called the earth.

But how can a person walk on a ball?

Mr. Xi also said that the sky is round and the earth is round, so they can see it from anywhere, and the earth is square, so they can walk on it.

But what Sister Qingyou said was reasonable and well-founded, and he seemed unable to refute it, and he was unwilling to refute it. In short, everything Sister Qingyou said was right.

"Zhu Shijie is a mathematician. His works "Si Yuan Bao Jian", "Zhang Qiu Jian Suan Jing" and "Nine Chapters of Arithmetic" are all outstanding works." Li Qingyou is a science and engineering girl, these are compulsory courses and are the foundation.

.

"I know "Nine Chapters of Arithmetic", it's all about arithmetic." Adi nodded.

Li Qingyou also breathed a sigh of relief and finally explained clearly.

When the siblings returned home, Adi saw Sister Qingyou tying the long stick to the originally shorter handle of the millstone, and Adi's problem arose again.

"This stone mill is already heavy enough. If I put such a big stick on it, wouldn't it just add to the burden?"

"What is the principle of leverage?"

"Why can a lever pull a stone mill?"

Li Qingyou almost fell to his knees. It's good for children to be curious about all unknown things, and she agreed with it, but she couldn't hold it in when she was too curious. She was not a virgin.

"Shut up and just watch." Li Qingyou ran out of patience and pointed at the stone mill, "Watch, it's time to witness the miracle..."

"What's a miracle?"

The previous lofty sentiments were like a deflated ball. Li Qingyou looked at Adi helplessly, "Can you read it first and then ask?"

Adi nodded, very well-behaved.

Next, Li Qingyou began to demonstrate her "miracle". Under the eyes of Adi with his mouth wide open and full of surprise, joy and admiration, the joy of being able to pull the stone mill was not as exciting as the excitement his little face brought to Li Qingyou.

big.

Small stars twinkled in the big obsidian eyes, like the starry sky, and as clear as spring water. The peaks of the eyebrows flew diagonally into the temples, like poplars passing through willows.

The palm-sized little face is like pearls and jade, as if he is walking on a brocade of flowers. All the prosperity in the world has been abandoned. Any jewelry beside him will be eclipsed and can only be reduced to a foil.

Charming a city and a country is nothing more than that, right?

Li Qingyou suddenly understood the state of mind of King Zhou You who was playing tricks on the princes.

I also thought that Adi has grown up like this now. In a few years, I don’t know how many crazy bees and butterflies will be attracted. Find someone with no power and power. He will definitely not be able to protect her. I don’t know how much trouble it will cause.

Come.

The kind of person who is powerful is as deep as the sea...

Li Qingyou felt anxious just thinking about it.

She has to prepare some dowry for her brother, so that even if she gets old and loses her looks in the future, she will still have the capital to settle down and live.

"Sister?" Adi's little hand was shaking in front of his eyes. Just now, Sister Qingyou had been staring at his face, with a face that alternated between happiness and sadness, which made him feel a little unsure.

Li Qingyou also came back to her senses and looked at the brother in front of her who was only eight years old and still too early to get married. She was thinking too far.

Extending the handle of the stone mill does save some effort, but only a little. After all, the yard is so big, and the radius is too long to draw a circle in the yard.

And as Adi said, the extra stick is also a burden.

Adi was too young and in bad health. Li Qingyou was afraid that he would be tired, so she had to work more by herself. After pushing the stone mill for more than ten rounds, he almost exhausted all his energy, but the soy milk was not grinded out yet.

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Chapter completed!