The system asks me to pick up trash

Xiao Yi turned his head to look at the first player in the vice principal's class, and said in English:

"You're smart, so tell me how many dimensions of the universe we live in?" Xiao Yi said in English, the letters were pronounced accurately, and the voice was coherent, without any confusion.

The vice principal was taken aback for a moment, and the students in their class also began to look at Xiao Yi.

Mr. Yu's classmates were obviously encouraged. Those who pick up trash also know how many dimensions the universe is, not bad.

It looks like we have the potential to beat them.

Teacher Yu's students felt relieved, and their brains began to work quickly.

Vice-Chancellor's First Racer Stands Up:
"Such a small problem can still stump me? The universe we live in is a three-dimensional space. A simple analogy is length, width, and height."

After finishing speaking, the vice-principal's first class player was very proud and asked Xiao Yi in turn:
"Didn't you mean to bring them to crush us? That should be a bit level, let me ask you, what is the mark of the four-dimensional space.

In what kind of space can creatures see what? "

After finishing speaking, the vice-principal's No. [-] player looked around proudly, giving people a feeling that I am the boss and who am I afraid of.

The vice principal also gave him a thumbs up.

They all felt that how could a trash picker think about things in the universe, that was too lofty.

This time, the accomplice invited by Teacher Yu was speechless. Presumably the leaders above also judged that Teacher Yu's teaching level is really not very good.

Teacher Yu's students look at me and I look at you. There is no description of the sci-fi universe and starry sky in English textbooks.

They really don't know what a four-dimensional space is, let alone describe it in English.

The trash picker invited by Teacher Yu can only speak English well, so it doesn't mean he has such profound knowledge of the universe, right?
It seems that no one can prove that Teacher Yu's teaching level is very high.

Teacher Yu's hope of advancing is slim, and he is a little worried.

Teacher Yu's students all felt that their team had lost, and waited bitterly for an explanation from the other party.

Xiao Yi stood up and asked in fluent English:

"You mean the four-dimensional universe?"

"Well, do you understand?" The opponent's number one contestant looked at Xiao Yi's crumpled clothes and asked jokingly.

The vice-principal's students also looked at Xiao Yi with disdain. A trash picker who understands four-dimensional space should be a scientist.

I didn't expect Xiao Yi to say:
"This is too childish. In fact, Einstein said this question 70 years ago before his death. You only raised it now. It's too outdated."

After Xiao Yi finished speaking, he laughed loudly.

The vice principal and his students were dumbfounded.

There was an answer 70 years ago, but they only found out about it recently after digging through a lot of materials and spending money to consult current science fiction experts.

Originally, I wanted to use this matter as a weight to win, crushing the teacher and their class.

Unexpectedly, he knew the answer to picking up trash.

Only Xiao Yi cleared his throat, and replied quite confidently:

"The so-called four-dimensional space is based on the length, width, and height of the three-dimensional space, with a time axis.

Don't underestimate the time axis. If human beings enter the four-dimensional space, they can go back and forth between the past and the future along the time axis.

But I advise everyone not to go to the past, because if you want to change your unsatisfactory past, it is likely to trigger the butterfly effect and lead to the collapse of our current universe.

It is possible that we humans will be reduced to a small number of people, or cause the human race to disappear completely. "

After Xiao Yi finished speaking, the classroom fell silent.

People were reminiscing about Xiao Yi's words.

No matter the students of Teacher Yu or the students of the vice principal, they have never heard of such a frightening thing happening in the four-dimensional space if they move at that point in time.

They were all blankly thinking about what Xiao Yi said, oh my god, they were completely fooled by Xiao Yi.

However, the answer Xiao Yi said was indeed correct, and the students of the vice principal did not raise any objections.

But next, even the vice principal couldn't answer the question Xiao Yi raised.