While Zheng Rui and Bian Na were discussing future arrangements, Zuo Youcheng and Fang Tong sat in the depths of the commissary, looking at the silhouettes of the rows of shelves in front of them with their backs to the light.

"Brother, do you think that if I secretly eat a pack of little raccoons, will I be killed?" Zuo Youcheng whispered.

"And potato chips." Fang Tong stood up with the chair next to him and took two steps forward to get the packaging bag on the ground.

"Hey, don't, I'm kidding." Zuo Youcheng hurriedly said, "I'm not hungry at all, brother, don't move." ”

Fang Tong still picked up the bag from the ground, slowly walked back and sat down, and handed the bag to Zuo Youcheng.

Zuo Youcheng took the bag, but just put it aside, and said with some concern: "Brother, your face is full of blood." ”

Fang Tong raised his hand and rubbed it symbolically, but the blood on his face had already begun to coagulate, and there was a lot of blood on his hands, and he couldn't see anything clearly.

"Why don't you go and wash?" Zuo Youcheng suggested, "I'll find the big guy and let her accompany you to wash." ”

"Forget it." Fang Tong shook his head in the dark, "Don't bother others. ”

As soon as he finished speaking, Zheng Rui walked over from the light in the distance, leaned over and patted Zuo Youcheng's shoulder: "You get up and follow me to the ground." ”

"How...... What's wrong? Zuo Youcheng was a little overwhelmed and reflexively moved back.

"What are you afraid of?" Zheng Rui felt a little helpless, "I'm just taking you out to test your abilities." Aren't you spatial? How to measure the spatial type in such a small place? ”

"Oh...... That's fine. Zuo Youcheng stood up on the table of the counter, still poor, "Big guy, if the alien comes, you have to protect me!" ”

"Okay, okay." Zheng Rui reluctantly promised again, and then walked up to Fang Tong and pinched his chin and looked at it again, his neck was still covered with blood, but fortunately, he couldn't see the wound at all, "You can go up too, wash the blood." ”

Zuo Youcheng hurriedly stood up and helped his cousin up from the ground. Looking at his nervous appearance, it seemed that Fang Tong had some serious illness. Zheng Rui couldn't help but feel a little angry, Fang Tong wiped her blood, I'm afraid that any injuries will be healed, and she still pretends to be so weak?

Zuo Youcheng and Fang Tong followed Zheng Rui out of the deepest part of the commissary and walked up the stairs to the surface again.

At this time, the water pressure at the broken water pipe was already very small, and because the water per unit time flux was too small, he could barely hold much water with his hands, so Fang Tong could only kneel on the ground and put his head close to the pipe mouth to wash his face.

Zuo Youcheng's eyes circled around from time to time, vigilantly watching for traces of aliens in the distance. However, seeing that Zheng Rui didn't look a little nervous at all, he seemed to be a little relieved, and began to squat down to watch Fang Tong wash his face again.

"Brother, be careful, don't touch the wound with water." Zuo Youcheng looked at the washed out sewage and couldn't help but persuade.

"It's fine." Fang Tong just replied lightly.

"If it's infected, there's really no cure." Zuo Youcheng muttered, "And it's on the neck...... What if bacteria get into the carotid arteries, won't they directly infect the brain? ”

Zheng Ruixin said that his wound was originally cut to the carotid artery, and it was about to be infected. But her blood can be brought back to life, and her brain infection is not a problem, so she is not so worried at all.

"Your brother is fine." Zheng Rui patted Zuo Youcheng's shoulder, "Hurry up and train, you're not afraid of aliens?" ”

"I'm afraid, I'm afraid, what you say, big guy, is what you say." Zuo Youcheng stood up and said flatteringly.

The test method designed by Zheng Rui for him is the single pendulum method, which calculates the g value of the position by recording the length of the single pendulum cycle. It's just that she doesn't have a stopwatch on hand at the moment, and the timekeeping tool she uses is still the mechanical watch of the commissary owner, so she has to record a few more cycles.

"Single pendulum? is worthy of being a big guy, what is the formula for measuring gravitational acceleration in a single pendulum? Zuo Youcheng leaned over to look at Zheng Rui's experiment notebook, "Wow, big guy, you are really professional......

Zheng Rui used a black pen to write "T=2π√l/g" in the notebook, then "g=4π^2l/T^2" on another line, and then "g~1/T^2".

She doesn't really need to know how long the rope used to do the pendulum experiment is, because it doesn't make much sense to calculate the specific g-value. All she needs to do is measure the period T when the ability is not cast, and then calculate the proportion of gravity that Zuo You's ability can magnify or decrease by the T value during the ability is released.

"How long can you change gravity in a single time now?" Zheng Rui asked Zuo Youcheng.

"Single? I can keep it ...... forever," Zuo Youcheng said, "It takes a long time to convert, but after the transition, it will ...... I was able to maintain it forever. ”

That's right...... Fresh.

Zheng Rui touched her forehead, it was really unexpected. Is co-authored this ability on-switch?

Thinking about it again, she suddenly understood something.

Changing gravity is a process of changing a state rather than a continuous release of a substance by bending space. To change the curvature of space within a certain range, it is probably necessary to have a considerable amount of energy (according to the mass-energy equation, energy = mass), and the total energy level must be on the order of magnitude of the celestial body, so that it may have a considerable impact on the earth's gravitational field. This energy is certainly not stored in the human body, and all the spatial type can do is manipulate this energy, so there is no problem of charging and discharging energy.

If this is the case, then I am afraid it must be related to high dimensionality, and it is estimated that it is about the same technical level as the so-called Alcubelli curvature engine - if that thing can really be realized - and according to the level of Kardashev civilization, it must be at least a level I civilization, right? In other words, civilizations that can master this kind of counting should be able to carry out interstellar travel.

Oh my God, what kind of guy is Earth messing with?

This is much stronger than the Trisolara......

"Big guy?" Zuo Youcheng asked tentatively.

"Nothing." Zheng Rui waved his hand, "You...... You can demonstrate it first, and I'll see what happens. ”

Zuo Youcheng nodded, raised his hand quite seriously, stretched straight forward like a zombie in an old ghost movie, closed his eyes and looked like he was "doing work".

Zheng Rui couldn't help but laugh when she saw it: "This is the standard action of the space-type ability release?" ”

"No, I figured it out on my own." Zuo Youcheng frowned and said, "Big guy, can you stop talking to me when I'm casting spells?" ”

Cast? The style of painting has changed again, and the second middle school has changed to nostalgia.

"Okay, you 'cast the spell' slowly." Zheng Rui laughed twice without giving face, and then took out the "single pendulum" she made with lollipops: "When are you going to convert, give me a signal." ”