In the backyard of Wei Gong's house, Cui Xiaoxiao was directing his apprentices to carry out strange activities.

A group of people wielded hoes in the backyard, making a wheezing sound.

Judging from the current progress, a large pit with a length and width of about 100 meters has been completed.

It's just that according to Cui Xiaoxiao's request, this pit still needs to be dug deeper, and then the four walls are sealed with marble.

Cui Xiaoxiao had already built a perfect shape in her mind.

Anyway, Wei Gong, this stupid guy, took in such a bunch of stupid apprentices and didn't teach them anything, is this really good?

This question only appeared in Cui Xiaoxiao's mind for a moment, and she left it behind.

She took the strawberries from the fruit bowl next to her and put them in her mouth, while she leisurely swayed her white and tender calves exposed outside her skirt.

Anyway, what the world has become has nothing to do with me.

The most important thing is to return to Earth.

Uh-huh.

Cui Xiaoxiao nodded, a sly smile appeared on the corner of her mouth.

While Emiya is not at home, he has the opportunity to do what he wants to do.

According to her idea, if her starship can be built smoothly in the near future, then it is necessary to practice gravityless in advance to allow the body to adapt.

A very basic way to achieve gravity practice is to counteract gravity by increasing the density of water and the buoyancy counterweight on the human body in the water, so as to simulate the weightless environment in space.

"When was the gravityless experience module invented?"

Cui Xiaoxiao raised her head to the sky, she really couldn't remember something so far away.

I don't know if I've experienced it.

Cui Xiaoxiao had already thought about its purpose in her brain, and a smug smile appeared on the corner of her mouth.

In addition, it can also be used as a swimming pool when not in normal times.

As soon as she thought of the swimming pool, Cui Xiaoxiao's mind came to mind the body of Emiya's six-pack abs......

"Ahh So shy! ”

Cui Xiaoxiao sat up from the chair suddenly, holding her red and hot cheeks with both hands, and her breathing was rapid.

"Oh hey, why do we have to do such an idiotic thing here!"

A disgruntled voice came from inside the pit.

Cui Xiaoxiao thought to herself, finally an idiot has opened up.

"That's right, a stinking little kid, why are you commanding us?!"

Growing angry voices.

"Because she's our little aunt, and," the speaker said, holding the hoe behind his back, wiping the sweat from his face with his other hand, trying to reassure everyone.

"Besides, didn't the little aunt say it? This is the task assigned by the Master, and it will be added to our assessment in the future. ”

Yes~~

When Cui Xiaoxiao heard this young man's words, she sighed in her heart - saved!

Sure enough, human beings are full of servility in their bones, and the boy who maintained order just now is obviously an honest and responsible type A blood, and he will probably become a good space station maintenance worker in the future.

As for the teenager who was the first to question 80% of them may have blood type AB......

Cui Xiaoxiao touched her chin and thought for a second-

It would be better to give him some tests, and if he didn't collapse here, he might not be able to take on the heavy responsibility.

Uh-huh.

The so-called test, when Cui Xiaoxiao was a doctoral supervisor, was often privately discussed as hellish retaliation......

"Little Auntie, do you think this is okay?"

These newly recruited apprentices have some swordsmith backgrounds, and even a few geniuses who are still very promising to become masters, and it only took less than two hours to make the pool what Cui Xiaoxiao wanted.

According to the design, the water inlet and drain outlets, the four walls and the floor, etc., are all made seamlessly.

Cui Xiaoxiao looked around and nodded with satisfaction.

"Little Auntie, why does Master want us to build this square pond for use?" One of the small boys raised his hand.

"Well......" Cui Xiaoxiao thought about it and decided to tell them.

In the usual spirit of education, she dragged a chair past her and stood up.

Teach them a lesson, and it should be compensated.

"In our hometown, ahem, in my hometown and that of your Master, there is a lake called the Dead Sea, and when people want to put people to death, they tie their limbs and throw them in, and they are able to float!"

"Hey, isn't that the Styx Lake of Beisha?" The little boy let out an exclamation.

"Styx?"

"Well, there is also such a lake in the desert of Beisha, and if you throw it into it, you will float," he thought down, "how to say it, it is more like there is a force that prevents you from entering it, it has a demonic nature, it can save people who commit suicide, but sometimes it is the embodiment of death, it is said that people who drink the water of the lake will basically die in the desert." ”

It's really ignorant.

Cui Xiaoxiao held her forehead.

"Actually, the principle of the Dead Sea and the Stygian Lake you just mentioned is very simple, because there is a high concentration of salt in it."

"Salt?!" Everyone let out a sound of surprise in unison.

"Yes. Because there is a high concentration of salt in it, the density of the lake water becomes large, and when the density of the human body is less than that of the water, it floats on its own. Therefore, in a state of water shortage, drinking high concentration of salt water is tantamount to suicide. That's why those people can't get out of the desert. ”

Everyone nodded in realization.

"I understand the latter one, but I still don't understand the density, density or something mentioned earlier." The little boy looked at Cui Xiaoxiao with a confused expression.

Cui Xiaoxiao was stunned for a moment, although this teenager didn't ask particularly specifically, but the general meaning conveyed was, why does the small density float on top of the large density? !

In a way, this beginner asks a remarkable question.

Many people do not delve into this issue when they study density, but take it as an axiom, but in fact, the conditions for this proposition to be true alone are very worthy of discussion.

For example, in the case of zero gravity, this conclusion is untenable.

For example, the shape of a mixture of oil and water inside a space capsule is very interesting.

Therefore, in order to explain this, it must be assumed that under the conditions of gravity, and on the opposite side it is a liquid.

If both sides are solid, it is said that the high density can penetrate over time, but the time it takes is not just a year.

But then you have to explain to them what gravity is, and the arrangement of molecules......

Cui Xiaoxiao glanced back at the expressions of these idiots who seemed to be eager to learn, hesitated again and again, and decided to give up.

"Well, I don't know much about this, can you ask Master Weigong yourself in the future?"

Cui Xiaoxiao reluctantly squeezed out a kind smile.

"Ah, indeed," the little boy scratched his head, "after all, the little aunt is only five years old, and it's already great to be able to understand so much!" ”

"Huh?!" Cui Xiaoxiao determined that something in the depths was ignited by his words.

No, not just burning, it should be said that it was a strong huge explosion!

What the?! You bastard! What the hell is it to treat children with contemptuous praise?!

When the little boy came back to his senses, he seemed to see the shadow of a demon on Cui Xiaoxiao's body......

The boy timidly retracted his right hand, which had just tried to touch the little girl's forehead.

At this moment, everyone reached an unprecedented unified understanding -

It's scary!