I live in prehistoric

Pork bone soup is stewed slowly from cold water, and the deliciousness and nutrition in the bones can be gradually released.Some scallions and bacon are also put in to remove the fishy smell and increase the flavor.After stewing, add a handful of white and tender Flammulina velutipes, which is delicious and delicious.

Gong Xi scooped up half a bowl and gave Xiangzi a taste.But let him be lazy, just put his mouth close and let Gong Xi feed him.

"cute~"

"Large Inuxiangko~"

"On how to raise a muscular husband..."

But when Gong Xi took a sip from that bowl, he realized that he forgot to add salt... The broth, which was already extremely light, had no salty taste, just like life lacking vitality, and the joy of life was lost. ah.

Drank soup, gnawed bones, and finished dinner.When Fei Shi'er arrived, the two of them were brushing their teeth.Gong Xi rinsed his mouth, spit out a mouthful of salty coarse salt, and brought the little girl a bowl of soup that was kept secretly.

Xiangzi's eyes are not small, but they are rolling around, which is really funny!

"Without vinegar, where does the sour taste come from~"

"Someone is jealous, it means being favored!"

"Is Xiangzi not full?"

"He is afraid that the broadcaster will be robbed by others."

"Kyoko who is jealous is also cute!"

Gong Xi just felt that the little girl's body didn't grow well when she was a child, and she didn't look very healthy. She hoped that she could supplement enough nutrition and radiate the youthful vitality that a teenage girl should have.

He took her to look at the bean sprouts first, and found that the sprouts were already half a finger long, and they looked like they could be eaten tomorrow.Remove those that do not germinate and change color, change the water again, and cover the basin with a damp cloth.

Randomly talking about some ways to eat bean sprouts, there are meat, mushrooms and bean sprouts... Gong Xi's mouth watered more when he thought of hot pot.But Fei Shi'er was still moved by his taste buds because of that bowl of thick soup.

Afterwards, Gong Xi showed Fei Shi'er the pigskin he brushed.It is very strong when you flick it with your fingers; it is still elastic when you break it. "Sew wool or cloth on the outside to keep warm. Your father used to hunt, let him save the fur to make some clothes for your mother."

Xiangzi's eyes followed Gong Xi's hand on the little girl, and it became more and more hot.

"Xiangzi's jealousy is a bit heavy! As expected of a primitive man's nature!"

"Actually, men are also jealous of their own children. I think the broadcaster only thinks of her as a little girl."

"A man in love~ Of course I hope that my lover's eyes will always be on me!"

"The upstairs is very experienced..."

First of all, let Fei Shi'er discover the beauty of life, have the passion to explore new things, and then teach her methods, tell her the perception of success and failure and the way to sum up. This is Gong Xi's original intention of educating people.Oh, I suddenly feel that I am quite suitable to be an enlightenment teacher...

It was getting dark, and the "practical observation" course had to come to an end. Gong Xi planned to continue teaching cultural theory, and Xiangzi would also participate in this area!

But when Gong Xi encouraged open exploration and asked Fei Shi'er to ask questions, she held back for a long time and only asked, "Uncle, when will you give birth to brother Xiangzi?"

"Hahahaha! I can't stop laughing..."

"Awesome my sister! So you are as worried as we are!"

"Xiao Gongxi's attributes have been seen through... throw a coin to comfort~"

"You will lose the love of Xiao Gongxi..."

"So~ Aboriginal people need gender education, podcaster!"

But this is the field he is least good at, Gong Xi recalled the jokes he told Xiangzi before with a dull face...

"He can't have children because he is a man." Xiangzi is worthy of being a good "student" and can apply what she has learned!

Fei Shi'er was surprised, looked at Xiangzi's face timidly, and said carefully, "That's Brother Xiangzi..."

"I'm a man too!" Xiangzi smiled, wondering why he was so proud... The little girl was really frightened.

"Well, he is a man, and I am also a man..."

"Genders are different, how can you fall in love..."

"I feel sorry for Fei Shi'er for three seconds!"

"I was so cute by Xiangzi!"

That night, Fei Shi'er was "forced" by Gong Xi to instill the concepts and differences between "male and female" no matter whether he was willing or not, curious or not.From the sexual characteristics at birth to the development of puberty, and then to the signs of maturity, it is roughly described.

During this period, the little girl's expression seemed to be watching some horror movie...

Xiangzi nodded frequently when Gong Xi was spitting, but she couldn't hide his shaking pupils and flushed cheeks.

As for the little girl who couldn't calm down after returning home, since then she became concerned about her body and appearance, and occasionally secretly looked at her younger brother's little brother, it was beyond Gong Xi's ability to know and control her.

The first "public lecture" made him very tired!Gong Xi felt frustrated, but also felt that he might have shown the little girl a path to "understand life".

"I let the child go, and he said that those things have been known for a long time..."

"Why am I blushing?"

"I noticed that Xiangzi frequently looked at the private parts of the other two..."

"Xiangzi pretends to understand, so cute!"

"Fei Shi'er is smart and sensible!" Xiangzi suddenly praised her, which made Gong Xi uncomfortable.

Facing Gong Xi's probing eyes, Xiangzi blushed, patted her buttocks and got under the covers.

Is it because of her question?It's really annoying, funny, and embarrassing...

Before going to bed, I took a look at the number of people online: 57823, and said good night to everyone; pay attention to the signal strength: 13%.Gong Xi checked today's date, calculated silently, and found that the increase in the signal seemed to be slowly rising.

He tucked in the blankets for Xiangzi and himself, and lay down preoccupied.

At dawn, Fei Shi'er's father came to see the situation, but accidentally saw Gong Xi moving the adobe bricks alone to "lay the foundation".Thanking the man, Gong Xi emphasized to him the importance of laying the foundation while continuing to work.

After all, adobe bricks are heavier and harder than thatch. If you don’t pay attention to it and don’t build it firmly, let alone a good life, it’s not worth it if you smash it directly.

"The broadcaster is not willing to wake up Xiangzi?"

"Caring~ I like a man like the host!"

"I feel like my mate selection standards are getting higher and higher, how can I break it?"

The conversation between the two awakened Xiangzi, and he hurriedly got up and joined the ranks of building the house.This is the house he and Gong Xi are going to live in, and he doesn't want to miss the brick by brick construction.

After mixing the mud, before laying a brick, it must be smeared on the bottom layer of clay bricks.Gong Xi's strength is indeed not strong enough, and he is mainly responsible for masonry work. Xiangzi and Hanzi take turns plastering and moving bricks.

In order to make the house more solid and beautiful, Gong Xi racked his brains and designed two small props, otherwise he could start construction earlier.

The plumb line and square ruler were born in the hands of Gong Xi.

The plumb line is easy to say, tie a stone with a rope, and rely on the gravity of the planet to know whether the wall is vertical to the ground (of course the foundation must first be flat).

Right-angled triangle ruler, using the Pythagorean theorem "hook three, strand four, string five" example, use a slightly shorter branch as a reference to compare branches three times, four times, and five times as long respectively, and leave more at both ends Come out and cut off some, and wrap the rope in two at the marked place, and it is done.The square and the plumb line can be used to check whether each layer of earth bricks is smooth.

"I understand the truth, but why can't I think of it?"

"Amazing my broadcaster!"

"Build a house! I can't even think about it!"

"Insert coins, let me witness a miracle!"

Gradually, the "project" has a certain scale, half a meter, one meter... The residents passed by in twos and threes, and they were all attracted by their actions.

Just by mouth, people always doubt Xiangzi's efforts, but the solid walls stand there, and they will look firm and warm.

However, Gong Xi realized from the increase in pedestrians that it was time for "gathering" and it was time to eat lunch.For a moment, the three men quickened their movements, as if they could finish work and eat immediately.

Fei Shi'er's pretty figure moved from far to near, giving the man a break to breathe, and she came with food.

Sitting on the clay bricks and eating, Gong Xi had another subtle understanding of the meaning of life and labor.

To his surprise, some folks came one after another, exchanged a few words with Hanzi and Xiangzi, and began to help.They seem to be weak and thin, and some of them can't even walk straight, but they have a lot of strength.

So the three main "architects" are responsible for laying bricks, and other assistants carry them, and the efficiency increases at a geometric rate.

"One hero and three gangs, hehe!"

"You come and I go is life!"

"I have a feeling that this room type will be popular!"

In view of the intention to use and renovate the original roof of Xiangzi's house, the walls on the east and west sides were built into pointed shapes, and the slope angle was roughly the same as that of the thatched roof.Gong Xi explained to everyone one by one, so as to listen to everyone's opinions.

The task that should have been completed in the dark, ended in the evening!

This time Gong Xi was embarrassed, he didn't expect to finish the project so soon, and the tree trunk used as the beam of the house has not been found yet.

"I know there is a tree that can be used if you touch it." Xiangzi suddenly said, looking at Gong Xi: "I heard from my mother that it was the year she gave birth to me, and my father personally found the seedlings to find a good place to plant them, and they are already very tall now. gone."

On the edge of the forest at the foot of the mountain, there are straight poplar trees, the one born in the same year as Xiangzi is particularly tall and straight.The fallen leaves all over the ground, the bare tree trunks, seemed to be ready to wait for Xiangzi to take it away.

The men waved their stone axes and chopped down the thick poplar tree that Gongxi looked at in a short while.For some reason, Xiangzi didn't participate in it.

He suddenly buried his face in Gong Xi's neck and shoulders, the hot tears seemed to scald Gong Xi's heart.

He grabbed Xiangzi's hand behind him and said softly, "Xiangzi, it will come back to life...it will accompany you."

"Suddenly sad..."

"My parents have done a lot for Xiangzi..."

"It would be great if you could be together forever."

"Upstairs... Maybe this is one of the reasons why Gong Xi was suddenly in a hurry to build a house."

The author has something to say: 1. If you put the meat in a pot with cold water, the umami taste will be released slowly; if you put it in a pot with hot water, the umami taste will be sealed in the meat.Therefore, if you want to drink soup, put it in a pot with cold water, and if you want to eat meat, put it in a pot with hot water oyeah.

2. Plumb line: According to legend, the Egyptians first used the plumb line when building houses. They knew that they could see whether their buildings were perpendicular to the ground by comparing them with the plumb line; This kind of triangular ruler can draw right angles, and the ratio of each side of the triangular ruler is 3:4:5

3 Pythagorean shares: In China, the "Zhou Bi Suan Jing" in the Western Han Dynasty recorded some vague statements about the Pythagorean theorem, which simply means "three hooks, four shares, and five strings".In "Zhou Bi Suan Jing", it is mentioned that the Pythagorean Theorem was first discovered by Shang Gao, so it is also called Shang Gao Theorem.Who is Shanggao?He was a mathematician in the late Shang Dynasty and early Western Zhou Dynasty.This person was active in the prosperous years when King Wu of Zhou destroyed Shang.The theorem was discovered in the special historical period when King Wu of Zhou destroyed Shang (the first month of 1046 BC (one said 1057 BC).

The Italian mathematician Pythagoras discovered and proved this theorem 600 to 3 years earlier.It is a pity that Shang Gao did not provide a more detailed proof, and the data (4, 5, [-]) he provided is just a special case of the Pythagorean theorem.Therefore, Shang Gao cannot be considered to have discovered the Pythagorean theorem.

About 500 years after Shang Gao's death, the Pythagorean school of thought, active in Italy, put forward a proof of this theorem, and discovered the existence of irrational numbers accordingly.About 350 years later, a mathematician in the middle of the Western Han Dynasty wrote a book called "Nine Chapters on Arithmetic" (the author cannot be tested), which gave a complete proof of the Pythagorean Theorem.Therefore, the Pythagorean Theorem was not first discovered by the Chinese, but only a special case of it.

4 The ancient poplar group (the direct ancestor of the poplar) may have originated in the western Gondwana ancient land in the mid-Cretaceous period; later it spread to related places (especially the northern Laurasia ancient land), and further differentiated during the migration process develop.The genus Populus may have occurred and differentiated in the eastern Mediterranean in the middle and late Tertiary; later it spread to the Eurasian continent and migrated to the North American continent through the Bering region.

This is the end of Xiangzi's sad story, and a strong man can't always be sad.

(づ￣3￣)づ