The tensile force of the spring is equal to the stiffness coefficient of the spring multiplied by the length of the stretch, if the stretched length exceeds the elastic limit of the spring, congratulations, if you pull the one with a carbon pen, then you will get a cool crooked that can pluck your ears; And the pressure is equal to, uh, if you want to press the spring so that it can't bounce back, you need to press the section of the spring into an ellipse.

Everything in the world is resilient.

Emotions are both ethereal and elastic.

Xiaowen is about to go to kindergarten and primary school in half a month, but he is not happy.

Knowledgeable, he is very busy in kindergarten, and a good summer means that you can see a lot of little sisters dressed in flowers, calves and arms, white and tender, bouncing on the ground, very cute, Xiaowen likes this kind of carefree and brain-less time the most, since he knows that he still has to go to elementary school, and there is a junior high school after elementary school, he knows that his good days are over.

After breakfast, Xiaowen didn't say hello to his father, and went out with a small schoolbag on his back.

Along the path he was familiar with, he slowly came to the school bus stop sign, with his hands in his pockets, shaking the schoolbag behind him, very bored.

The school bus appeared far away, and then made a quick big turn, and it was almost about to drift, but the driver still held back, after all, this is a school bus, not a racing car.

Click, the school bus stopped steadily in front of Xiaowen, and the door slammed open.

Hi Xiaowen, are you alone? The driver looked at Xiaowen with a sad face.

Hmph, listen, are you talking about human words? Xiaowen muttered.

Ha? The driver didn't understand what Xiaowen was saying.

Xiaowen's father panted and watched Xiaowen get on the school bus, stomped his feet hard, and said angrily, Don't say wait for me!

Xiaowen saw his father stomping his feet angrily in the distance from the car window, and the corners of his mouth curled.

Old driver, aren't you leaving? How long will we have to wait? I came up, and no one else came up, Xiaowen saw that the school bus driver didn't start the school bus, so he asked.

Let's go, let's go, and when we're done charging, we'll go. Hey! Who is old? I'm only 30 this year, where are I old? The driver was wiping the glass of the car in front of him, turned his head, his old face was flushed, looked at Xiaowen, and shook the rag in his hand.

Xiao Wen cut and tilted his head to look at the white clouds in the sky.

It's going to rain. Xiaowen predicted in a low voice.

You know a! The school bus driver's voice came out of his mouth, spread to the car glass in front, and bounced back to Xiaowen's ears.

Just know more than you do! Xiaowen didn't bother to talk to the school bus driver.

Well, I ask you, what is one thousand four hundred and ninety-six times three thousand two hundred and fifty-one? The school bus driver looked back and smiled.

Equal to six. Xiaowen gave the answer without hesitation.

Ha! You're wrong! How could it be equal to six! You don't mean you know more than I do, you can't answer that! The driver burst out laughing.

It doesn't matter if it's wrong, the important thing is that I can give the answer in a split second, can you? Xiaowen shook his head.

You! Okay, you %#! The driver didn't want to talk to the little bunny behind him anymore.

By the way, didn't you charge your school bus last night? Or did you forget? Xiaowen was a little impatient and felt like he was going to be late.

Don't talk nonsense, there's no such thing! After saying that, the driver started the school bus with two clicks.

It's so boring, I can't even make a lie. Xiaowen showed contempt for the driver again.

After that, the school bus picked up the students of other kindergartens one after another, and at the moment when the school bus ran out of power, it stopped steadily at the entrance of the campus through inertia.

Goodbye kids! The driver of the car greeted the students who got off the bus cutely.

By the way, how are you going to drive back in a while? Xiaowen was the last to get out of the car, standing at the door, looking back at the driver with disdain.

Don't worry about it, alright! Hurry up! I'm closing! The air conditioner in the car is gone! The driver glared at Xiaowen and hurriedly urged.

Xiaowen walked to the classroom with a puff, suddenly felt that the voice was wrong, and looked down, your sister, why did you come out in slippers? However, it feels so comfortable, much cooler than wearing sandals. So, Xiaowen is in a good mood and feels that today will be a good day!

It was not yet noon, and it was raining heavily.

Lying in front of the window, looking at the hazy scenery outside, Xiaowen kept sighing.

What does our little genius sigh for? The beautiful and quiet female teacher came over, sat next to Xiaowen, and looked out together.

It's raining! What else could it be? Xiaowen always thinks that the people around him ask some children's questions.

Hey, it turns out that our little genius is very sad when it rains! What a sentimental person! The female teacher squinted at Xiaowen.

Xiaowen looked the female teacher up and down, and felt that she was no different from usual today, but why was she so stupid in her speech?

Did you think of something unhappy that is why you are so quiet? The female teacher touched Xiaowen's head.

Oh, yes. Xiaowen thinks that the female teacher is good at this, empathetic, of course, the skills in her hands are also good, every time she touches her head, she feels very comfortable, her mind is broadened, her thinking is also quick, and her vision is unique, anyway, her brain is better.

Can you tell me about it? The female teacher rested her chin on the back of her hand and looked at Xiaowen.

It's okay to talk to you, but don't tell anyone else. Xiaowen looked at the beautiful eyes of the female teacher very seriously, mainly to see the color of her pupils, which were blue and beautiful.

Okay, I promise not to tell anyone! When the female teacher heard it, she had something to be serious.

Okay, then I'll tell you.

Poof! The female teacher burst into laughter.

What's wrong?

It's okay, you continue.

Really, no problem, don't interrupt! Xiaowen glanced at the female teacher.

Yes, Teacher! The female teacher raised her left hand in a careless manner.

You should know that we will continue to go to elementary school after kindergarten, right?

Hmm, what's wrong with that? The female teacher nodded.

Problematic! That's a big problem, I'll tell you! Xiaowen's tone suddenly became much heavier, and he almost rolled up his sleeves.

Oh?

Isn't it! You see, how happy, how free, how wonderful our kindergarten life is, right? As soon as I go to elementary school, I have to go to class every day, I have to do my homework after class, I have to be punished by the teacher if I can't finish it, I have to hand it in when I finish it, I have to redo it if I don't do it well, and I even have to call my parents if it's serious! You see, is this the life that people live? The more Xiaowen spoke, the more angry he became.

You...... Who do you listen to? Your mom? Going to elementary school is as scary as you say! The female teacher smiled slightly.

You don't care who says it, just tell me if that's the case. Xiaowen looked at the female teacher very seriously, if she lied, then she wouldn't play with her in the future.

Well, elementary school is pretty much what it looks like. But it's an educational process that each of us must go through. The female teacher's tone began to become serious.

Oh? Is it true that everyone can only grow up if they have gone to elementary school? Xiaowen asked rhetorically.

No, but you have to get a quality education, you have to be able to read and count, and if you don't go to elementary school, how do you learn this? The female teacher suddenly thought of this idea.

I can study on my own, I don't have to go to school every day, I have to pay tuition, write homework, take exams or something, it's too troublesome. Xiaowen shook his head.

But not everyone is as smart as you are! The female teacher looked at Xiaowen with a smile.

That's right, too. Xiaowen was persuaded by this sentence and nodded.

Lunch was personally delivered to the classroom by the master of the school canteen, and this coke spoiled the children.

As soon as lunch was eaten, the rain outside stopped.

I should have had lunch early. Xiaowen knocked on the bowl sullenly.

Xiaowen, I still have a steamed bun here, I can't eat it, let's eat it for you! At this time, a cute little girl walked over, not tall, with two small pigtails, red lips and white teeth, and a small mouth slightly open, holding a steamed bun and handing it to Xiaowen.

Thanks! There was still a little bit of vegetable soup, which was so timely. Sit there, don't stand stupidly. Xiaowen took a big bite of the steamed bun and bit it halfway, pointing to the opposite position.

Oh what, I heard you came to school alone today? The little girl was a little nervous and glanced at Xiaowen from time to time.

Xiaowen is not very old, but he is very good-looking, and he belongs to the kind of men and women who eat all ages.

yes, aren't you? Xiaowen sucked the mixture of vegetable soup and rice soup, uh, soup.

I'm not as brave as you are, my mother sent me. The little girl continued to fiddle with her clothes.

Oh. Xiaowen, you will have one, oh?

What, have you heard? I heard that after going to kindergarten, I will go to elementary school! The little girl finally mustered up the courage to say something she had been holding back for a long time.

I've known it for a long time, what's the matter, don't you want to listen to your tone? Xiaowen finally raised his head and began to look at the little girl.

The little girl was taken off guard by Xiaowen's sudden head-up, and quickly lowered her head, her little face flushed, and she nodded slightly.

Two months later, Xiaowen was dragged by his parents with his schoolbag and dragged by his parents to a place he thought was hell. In a large classroom, Xiaowen saw the little girl and nodded at her.

While her parents were chatting, Xiaowen pulled the little girl and ran out secretly. The two of them were like thieves, scared to death, and then looked at each other and laughed.

Elementary school, junior high school, high school, the two have gone through twelve years together and spent eleven happy years.

The intense study in the third year of high school, coupled with the huge pressure from his parents, as well as the continuous decline in his academic performance and class ranking in the last few times, Xiaowen suffered from depression, and his face was sad all day long, and pessimism filled his brain.

It didn't take long for Xiaowen to get lost.

The girl's parents and Xiaowen's parents searched everywhere and later called the police.

I searched for many years, but I didn't find Xiaowen.

Years later, on a hill on Mercury, someone found a burnt ash spacesuit and a heat-resistant composite board with a string of numbers written on it: 4863496.

Finish.