Ding dong! Teacher Bai rang the doorbell, she never expected that it was a flower-like girl who came out to open the door, "uh......" for a while she was speechless.

"Are you looking for Wang Fang?" This flowery girl was even more surprised than Teacher Bai, because in her eyes, Wang Fang was not Wang Fang at all, but an airplane without wings.

At this time, Wang Fang walked over while frowning and touching the back of his neck, because he was not used to sleeping in the small bed, he fell into his pillow, and from a distance, he beckoned to Teacher Bai: "Oh, Teacher Bai is here, let me introduce you,...... Hey? You've seen it, right? Teacher Bai is the teacher of Ni Hong Kindergarten. ”

Ouyang Fen shook his head: "Recently, I have rarely picked up Ni Hong, it turned out to be a teacher, could it be that I came to visit my home?" She finally found an explanation that she thought was plausible.

Wang Bang said, "No, I have a ...... with Teacher Bai This one...... Collaborative projects. ”

Teacher Bai came in and wanted to take off his shoes, but there were no extra slippers, he was very embarrassed and hesitant, and Ouyang Fen was secretly amused.

Wang Fang could only say: "Don't look for slippers, just rush in." Anyway, I haven't mopped the floor for almost a year......"

Ouyang Fen smiled: "Yes, I just wanted to help him mop the floor, oh, I don't have a key at home, I will spend the night here in Lao Wang, Lao Wang is a good person." ”

Wang Zhan: "Ahem, can you not call me Lao Wang?" Doesn't sound like a good person. ”

The children are afraid of the teacher, Teacher Bai is new, and he has little experience in teaching, and Ni Hong, who has just learned to be in charge of ghosts, is not so afraid, but he still timidly called "Teacher Bai".

Teacher Bai said hello to the children and said to Ouyang Fen, "Let me discuss with Wang Fang what should happen next for our podcast program?" We don't even have a name. ”

The wooden-headed king really doesn't know how to serve people, and the three of them just stood and chatted.

As soon as Teacher Bai said this, Wang Zhan's head immediately began to run at high speed, and he said, "You must have an eye-catching name." Just like a Valentine's Day couple showing affection in front of a veteran member of the Single Dog Protection Association, it has a flashbang-like effect. ”

Teacher Bai: "It's not so exaggerated......" Hearing Wang Fang's exaggerated description, she instantly forgot the embarrassment of entering the house, but the small bag was still in her hand, looking like a newcomer.

Ouyang Fen was curious: "What podcast?" You're so stylish. ”

Wang Bang glanced at Ouyang and said, "You almost know this name - a beautiful virgin in the flower season talks about popular science!" Tsk, what's the name? ”

Teacher Bai blushed like a flowery season, and said, "Are you trying to bring the followers of the Flying Ramen God Sect to listen to our show?" ”

Ouyang Fen snorted, covered his mouth and smiled: "You two are so funny......"

Wang Zhan: "Really? I really want to be amused, these days, who wants to listen to hardcore popular science? Who doesn't amuse who listens to your show? I named my show 233BC, but I didn't get into the state after several episodes, and I wasn't 233 at all, and I was also depressed, but the general direction was right. ”

Teacher Bai: "Take your time, I believe in Mr. Wang's talent, a man who can solve Joseph Needham's problem, what else can't be solved?" ”

Ouyang Fen: "What? This guy solves this problem? How was it solved? I know what Joseph Needham is. If you can do this, then you are not popular science, but an original scientist, of course, I estimate that you are also a 99% civil science who can't get into the hall of elegance, and is one of the thousands of civil science that question the theory of relativity that pops up every year. Still, I'd like to hear what you're talking about. ”

Teacher Bai smiled: "Then you can listen to the program I recorded." She advertised herself.

Finally, the guests found a sofa and sat down and chatted slowly. Ouyang Fen went to make tea for the guests like a hostess, and she also touched the edge of the tea jar with the tip of her small and delicate nose, and said, "This Longjing is not new tea!" ”

Wang Zhan: "Huh? Can this be smelled? It really has the sense of déjà vu of a small rodent. It seems that I bought too much Longjing and left it for a while. ”

Teacher Bai casually asked, "What is the allusion to 233BC?" Sounds weird. ”

Wang Zhan: "233 is laughter, you must also know, BC is the broadcasting company, the BBC is the British Broadcasting Corporation, their signature dishes are documentaries and popular science, what earth, planet, human beings, art, I think the BBC has done a better job in this regard than National Geographic, British English can make people immersed in the pursuit of knowledge full of happiness." ”

Teacher Bai: "It's really level, but 233 really can't be combined with popular science, and it's hard to be bruised." Isn't this translated into Chinese a laughing broadcaster? It's more straightforward than the programs of "Tonight to the Post-80s" and "Qingqu Society", but it talks about knowledge, and it must be renamed, what do you think? ”

Wang Zhan: "Can you slow down?" Because I'm looking for feelings, you know, things that are too amusing are not long-lasting, and amusement is often combined with a silly fork, whether it's ethics or teasing, or an encyclopedia of troubles, which is not a silly fork? This thing doesn't last, and if you listen to this kind of thing too much, you'll become a stupid fork yourself, and we don't want to, right? ”

Teacher Bai: "That's really annoying, only people who are stupid can have more money, right?" Doing knowledge programs will eventually be tragic. ”

Wang Zhan: "Anyway, I don't plan to make a show to make myself a stupid fork, although it is very difficult, but what if I succeed in finding the feeling?" Isn't that awesome? ”

Ouyang Fen made three cups of tea, and the paper cups were the ones she had just bought at the convenience store downstairs last night. She said while making tea: "The dead ghost in our family said that Lao Wang is not willing to be mediocre, people learn PHP, he just learns Ruby, people use stupid forks, Ya just don't need it." I always think that one day the salted fish will turn over. 233BC…… Burst! Coke, which in itself is a silly fork name. ”

Wang Zhan: "...... You're going to make me miss this dead guy when you say that, and I'm not so sad about it...... It's rare to have a confidant in life. ”

Teacher Bai turned his head and glanced at Ni Hong, the child didn't know anything about what was going on, and he was fiddling with the red rice that Uncle Wang bought for him, and he was very happy.

Ouyang Fen listened to the program recorded by Mr. Bai and concluded: "Mr. Bai's performance is very good, but Mr. Wang, your script is problematic and not colloquial enough, you really need time to understand the difference between podcasts and articles." ”

Wang Fang humbly asked: "Teacher Ouyang will give more opinions and suggestions." ”

Teacher Ouyang: "Also, there are too many dry goods, which is not a good thing for podcasts, I think you can be a little more salty." ”

Teacher Bai snickered.

Wang Zhan: "...... Makes sense, it's a little salty and wet, I'm really eager to try, hey, let's discuss the next topic. ”

When it comes to popular science, Mr. Ouyang thought of a topic that has been very popular recently, and said: "Now that the popular science community is talking about gravitational waves, what does Mr. Wang think?" ”

Teacher Bai was taken aback: "Don't be such a cold question, right?" I don't understand. ”

Wang Zhan: "Nowadays, many people who are engaged in popular science are using four-dimensional space to explain gravity, and they have drawn the gravitational field as a schematic diagram of the collapse of three-dimensional space, to be honest, I don't see any need to use this four-dimensional scale to explain gravity. I'm not saying that this geometric approach is wrong, it's just not necessary. Old man Newton said that if it is not necessary, do not add entities, so what can be explained in three-dimensional space should be explained in pure three-dimensional space. ”

Teacher Ouyang didn't care about Mr. Bai's protests, and automatically entered the brainstorming role: "So you can use Old Man Newton's theory to explain gravitational waves?" Let me hear what you have to say, an unreliable civil science. ”

Wang Zhan: "What's wrong with Minke?" Who really cares what gravitational waves are? Our mission is to take a group of people who don't have advanced physics knowledge to play a game of nonsense! ”

Teacher Ouyang: "Let's get to the point, let's correct the name of the civil science department when I have spare time in the future." ”

Wang Zhan: "Teacher Ouyang has a good education. Then I'll start talking nonsense...... It's really nonsense, don't hit me if it's wrong. I'm starting to black the four-dimensional space. First of all, let's figure out what is going on in 1D, 2D, and 3D, and explain the ins and outs of dimensions to know what 4D is.

One-dimensional space is only one degree of freedom, which can only be forward, or backward, no, let's use a pair of degrees of freedom to describe it, because there is a front and a back. Just like a double-headed train, like our high-speed rail and bullet trains, it can only go forward or backward, and the track is set.

Two-dimensional space means that there are two pairs of degrees of freedom, which can not only move back and forth, but also turn left and right. Just like us land animals, we can't fly, we can't dive, we move on a flat surface.

Three-dimensional space is the birds that we have been particularly envious of since childhood, and there are more degrees of freedom that can go up and down, three pairs of degrees of freedom.

Well, now scientists have said that there is a fourth dimension that we don't usually see, neither front nor back, neither left nor right, neither up nor down, and you can actually move in the seventh and eighth directions, what does this mean? Will you move me in the seventh direction?

Obviously, there is no means, no means of transportation to help us move in the seventh and eighth directions. So what do scientists mean by four-dimensional space?

This was originally a geometric method used by general relativity to describe the gravitational field, note, this is a geometric method, not that Einstein thought that in addition to three-dimensional space, there is a fourth dimension, just like the K-line chart of the stock market, physically there is only one bid and transaction price of the stock one after another, there is no such thing as zài like a real tide that rises and falls for a while, it is a geometric display after mathematical abstraction.

However, after seeing Einstein's geometric explanation of the gravitational field, many people have regarded the collapse and distortion of space as something that really exists. I'm not saying that the fourth dimension doesn't need zài, I mean, at least in this scenario, the fourth dimension doesn't need to save zài. Comrade Einstein, I just said that the intensity distribution of gravity is like a pit in space.

The difference between these two is huge. We can imagine a human society 100 million light-years away, and the story of a prince and princess is being played out at this moment, and if we can see it through a telescope, it will be 100 million years later. So it doesn't matter to us whether this story is happy or sad, but we can imagine that there is such a story.

We can also imagine a fourth-dimensional space, but we can't interact with this space at all, you don't have this degree of freedom, and there are no monsters coming out of this space. What's the difference between this space and a story that takes place 100 million light-years away? Whether this space really exists has no effect on the world we are familiar with. Its existence is equivalent to that of not saving zài!

Hey, what's wrong with you? How did you pass out? ”

Yes, Teacher Bai and Teacher Ouyang have both made a posture where their brains have been burned by strange information and they have passed out, the posture of the two beauties is so beautiful, even if it is a faint posture.