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Levi only knew that he was in the third school district, and he didn't know where he was going. In fact, he is definitely not familiar with the school city.,The places he frequents are the seventh school district where Kuroko Mikoto goes to school and the third school district where he is now.。 I know this third school district.,It's because the first time I entered the school park city, it was here.。

The third school district concentrates most of the external facilities of the school city, such as the international exhibition venue where Levi took a few girls to during the Daba Star Festival, as well as the best hotels in the school city. In general, the third school district is the window of the school city to the outside world, showing advanced technology to the outside world and negotiating cooperation with outside companies here. Levy's first official visit to the school city,It was an exchange activity between Ma Fan Liang School Park and here.。

"The 14th school district has the highest concentration of international students."

Ariki reads out the annotations marked on the map.

"Oh? Students? ”

The two of them walked as they talked, and after a while, they entered the territory of the 14th School District, and the style of the building changed so obviously that it was impossible not to notice it. If the third school district's large venues feel grandiose, then the patchwork of buildings from all over the world is like being in a worldwide theme park.

Levi had heard of this place before, and seeing such a wide variety of architectural styles gathered together without looking cluttered made him express his heartfelt admiration for the overall designer of this area.

"Although the technology of the school city is more advanced than the overall level of the earth, it has not yet reached the point where it can be self-sufficient only by recycling resources. In exchange for the provision of necessary materials through external partner countries and organizations, in addition to technical support, the exchange of international students is also one of the aspects. ”

There is no need to ask where this knowledge comes from in Youxi's head, what is the difficulty of her special life body that specializes in information? What's more, Levi also gave her a computer, which is only a relatively new and exquisite electronic device in the eyes of ordinary people, and in the hands of Youxi, I am afraid that it can swing the level of the most cutting-edge scientific research mainframe computer in the city.

"Even if we can be completely self-sufficient, I think it's better not to be like that, resource recycling or something...... It's a little uncomfortable. ”

Although it sounded like a high-level topic, Levi was unexpectedly able to pick up on this topic. In fact, thinking about the place where he used to stay and work, it is not difficult to understand, how can a person who works in the whole galaxy and even the entire universe limit his eyes to the earth? It's true that Levi is a little forgetful and very confused, but that doesn't mean that he has forgotten everything about the past, such as the first appearance of Eve from the base of that criminal organization, doesn't he still remember it as if he was born yesterday?

"Why?"

The girl asked Levi with her expressionless face, she didn't understand what was wrong with what she was saying.

"Resource circulation is the foundation of the ecosystem, and it is under this premise that organic life can survive."

Yuki thinks that most people should understand this simple truth, especially since Levi is still a high school teacher, even if he is in charge of language teaching, he should not lack understanding of these basic common sense.

"You should know a lot about other intelligent beings in the universe, right?"

Yuki nodded, the only people she had actually come into contact with were those she had met on Earth, and if it weren't for the fact that Levi was surrounded by alien visitors like Eve, Mengmeng, and Fett, she hadn't seen life on other planets with her own eyes. However, the consciousness itself is the consciousness that is produced by the combination of countless free information in the universe, and it has no entity but evolves by continuously extracting other information. The life forms of the Unified Mind Body belong to a vast and vast network, as the name suggests. To take the common computer on the earth as an analogy, Youxi is equivalent to a workstation, and the unified mind body is a server that stores a corner of the distant universe. Her humanoid terminal is of course limited by the server, which can force her to give instructions and give her the corresponding permission to execute the instructions. At the same time, Youxi can also obtain the required information from the server within the scope of its own permissions. It doesn't matter if she hasn't been to other planets outside of Earth and has come into contact with local lifeforms, it's enough to have information that she can consult.

"Similar to some long-distance interstellar voyages, I have seen fleets that rely solely on the resource circulation system to maintain the survival necessary for the survival of the ship, and basically do not need supplies."

Yuki still didn't understand what Levi was trying to say. The kind of fleet described in Levy's words she also knew was common in intelligent life that was not so technologically advanced but had exhausted the resources of the home planet. The resources referred to here are not only basic materials such as food and water to maintain human existence, but mainly land and environment, which are easily ignored by unreachable planets. People will starve to death without food and water, but if they live on a planet that is no longer inhabitable for organic life, even having enough food and water is of little point. In Ariki's view, the earth is now moving in that direction. Pollution is getting worse, but countries continue to ignore environmental protection for the sake of competition. One day it will turn Earth into a death star filled with poison gas.

"I've spent some time in one of those boats and seen them put the bodies of the dead in a solution and decompose them into usable substances...... Although it is necessary to sail in the universe without supplies, it is still difficult to accept anyway. ”

The expression on Levy's face was very subtle, and it seemed that he could save lunch a little. Yuki still didn't understand his thoughts, and still tilted his little head as if he was cute-in order to let his expressionless self accurately express his inner activities, Yuki gradually learned body language such as shaking his head and nodding. And crooking her head is the only action she has learned that can clearly express her doubts, so don't think that this alien girl has been trained by someone to become a malicious puppet.

"The carcasses of organic life are broken down by microorganisms and become nutrients that plants can absorb and enter the bodies of animals that eat plants, and the same is true of the ecological cycle on Earth."

If the teacher in charge of the biology class heard it, he would definitely be surprised that he didn't notice that there was such a good student in the class who listened carefully, who made Youxi look too stupid, even if she sat obediently in the classroom, it was easy for people to misunderstand that she was actually out of the realm for a long time?

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