"This is called a three-view view, and the image of the front, side and top of an object is drawn on the drawing at equal scale, with the dotted line representing the other side that cannot be directly observed. The different colors represent different members, and these symbols are simplified numbers, followed by units that tell you what the actual length of the line is; This is a scale, which indicates the proportion of how long the drawing is longer than the actual length......" Standing in front of the blackboard, the island pointed to the enlarged drawing by Dai Huadong and explained to the group of soul guide students below.

They had already returned to the Soul Guide Department from the Poseidon Lake and came to a classroom, where everyone was holding the upper and lower volumes of "The Daughter of the Sea" signed by Dai Huadong.

"There is such a convenient way to draw! Why didn't I think of it before. Several teachers were very excited, took out their notebooks and began to frantically copy the excerpts from the islands to the notebook.

When Dai Huadong saw this scene, he still sighed a little, the technological development of this world is too deformed.

“…… Next, please ask Dai Huadong to explain to you the basic principles of the operation of these structures, if you don't understand the principles, you are no different from those ordinary blacksmiths. Lidao said, then walked to Dai Huadong's side, lowered his voice and said, "I can't go on anymore, you can explain it to them." ”

Dai Huadong was stunned for a moment, and then lowered his voice and said: "Hey, hey, I thought you could finish speaking, aren't you a legendary scholar?" ”

"Even if you are a top student, you can't let him understand the whole subject after only reading a book for an hour." "You're in too much of a hurry." ”

Dai Huadong smiled awkwardly, and then could only walk onto the podium, but fortunately, he successfully verified some basic scientific rules.

"Ladies and gentlemen, the next thing I'm going to talk to you about is the principle of leverage, but before that, I'll explain to you the basic units." It's not that there are no unified weights and measures, it's just that Dai Huadong is really not used to the units of the Douluo Continent, and it is also a text unit, so it is too troublesome to write.

Those students and teachers listened quite carefully, they already had a certain foundation, and with the chicken blood that Dai Huadong's speech gave them, they understood quite quickly. And I couldn't stop at all, so I talked like this for a night.

The next day, Dai Huadong walked into the classroom with a yawn, yesterday he had been talking all night, and now he has only slept for an hour, and he is sleepy to death. And his voice is hoarse.

As for Huo Yuhao, he was no better, he listened to it for a night, and he didn't feel anything when he listened, but after it was over, he felt a wave of sleepiness coming up, and he almost fell asleep directly on the ground.

Xu Yiyi didn't stay up late at all, and Dai Huadong could only sigh that the physical fitness of the deep sea was strong.

"I didn't expect you to have such lofty ambitions, I have a different opinion of you." Wang Dong was much more energetic than them, because he fell asleep on the table like Xiao Xiao in the middle of hearing it last night, but when he woke up in the morning, he felt as if the bones in his body were rusty.

Dai Huadong glanced at him and said, "No, in fact, I don't have that kind of experience, and I don't have that kind of ideal, I just pretend to have a very ambitious goal and let them work for me and give them some chicken blood by the way." ”

"Huh?!" Σ(°Д°;

"Ha~" Dai Huadong yawned and said: "The brains of hot-blooded teenagers are not very clear, so as long as they use some ideals, justice, or something, they can fool them into being free thugs." The cost is a big cut in an instant, isn't it? If you look for those craftsmen, I don't know how much it costs. ”

Wang Dong, Xiao Xiao and Xu Yiyi all looked ruined.

"I didn't ...... I didn't expect you to ...... It's actually such a person. Xu Yiyi's eyes widened.

Wang Dong was also embarrassed for a moment, pointed at Dai Huadong and said, "I knew that you guy didn't have a good heart!" ”

"It turns out that Yuhao, your second brother is actually such a realistic person?" Xiao Xiao couldn't believe it.

"Okay, I'm going to squint for a while, squad leader, and call me when class comes." Dai Huadong didn't care, walked to his place and fell asleep on his stomach.

Soul guide system, Fan Yu found that his eldest disciple and Caitou did not go to build the soul guide, nor did they practice the operation of the soul guide, but looked at a book and carved some strange things.

"What is this?" Fan Yu asked suddenly.

As soon as he raised his head, he saw Fan Yu, so he hurriedly stood up and said, "Teacher." ”

"It's okay," Fan Yu waved his hand, looking at what he had put down, "I just want to know what you're doing, and I can actually make you pause the production of the soul guide." ”

He Caitou scratched his big bald head a little embarrassedly, and said: "This is something taught by Huo Yuhao's second brother, and that big guy can't do it for the time being, so he plans to do these simple exercises first." ”

"Big guy?" Fan Yu noticed this.

"Listening to Senior Brother Dai Huadong, it is a means of transportation that can quickly transport a lot of things." And the head of the dish said.

"Soon? Substantial? Was it designed by Dai Huadong? Fan Yu knows that Dai Huadong, the guy who deliberately lost in the finals of the freshman knockout round, I heard Zhou Yi say that he is a guy who likes to play smart, but he is also the smartest guy in her class.

"No, no, no, it was designed by Xu Yiyi, the squad leader of their class assault department." And the head of the dish explained.

Xu Yiyi, Fan Yu also heard Zhou Yi mention, obviously a very talented and powerful student in the strong attack department is not like a second-ring soul master, but he wants to report the soul guide system, and as a strong attack department, he behaves like a bully, I heard that she also has a disease called "split personality", and when she gets out of school in the afternoon or when she releases the martial spirit, her personality will change dramatically, and then return to normal the next day. It's just weird.

"Xu Yiyi? She's a core disciple of the Martial Soul Department, right? Can you design a soul guide without learning about it? How is it possible, how can the research and development of soul guides be so easy? It's just nonsense. Fan Yu frowned, "They are not sensible, why are you messing around?" ”

"No, Sensei, I believe that their design will succeed," and Nanatou objected to his teacher for the first time, "Although they are not even adults, their eyes are definitely beyond this world." I also want to set foot in the starry sky. ”

Fan Yu could see the firmness in Kazuna's eyes, which made him a little distracted. Before yesterday, he had always felt that Natou's heart was not as cheerful as it seemed, and deep in his heart, it was full of hatred and confusion, so he put everything into the soul guide, and these negative emotions pushed him to work hard until now. However, Fan Yu could feel that the current Wa Natou seemed to have undergone a baptism of something, and his eyes were full of determination and hope, just like ...... A confused person has found his goal.

After a while, Fan Yu said, "Okay, I'd like to see what they come up with that makes you feel successful." What about the blueprints? ”

He Caitou was a little embarrassed, and said: "The design drawings were taken back by them, because Dai Huadong's junior said that with the current technology, too much manpower is needed, and he can't afford to buy so much iron ore for a while, so he ......"

"How big is that thing?" Fan Yu is a little curious, if the means of transportation is not big, the manpower and materials needed will not be too much, and he can make it up with a little scrape.

"I don't see it, the symbols are too small."

“……”

"But Dai Huadong and Xu Yiyi will come to give a lecture at noon today, they should bring the drawings, after all, there are still many incomprehensible places."

"Okay, take me to see at noon, how can the things taught by the two students of the martial soul department be called lectures." Fan Yu said.

Dai Huadong, who was making up for sleep, suddenly had a tremor in his dream, he looked around in a daze, found no abnormality, and went down again to make up for sleep.