"Xiaoying, don't run around alone when you go to Shangjing, you have to be with your brother."

Erxing Qianli's mother is worried, Lu Yi is out now, Lu's father and Lu's mother are not too worried, but Lu Ying's first time out of the province to run so far away makes the second elder always feel at ease, holding her hand and instructing.

"Got it, Mom, don't worry, we're going to catch a plane, and I'll send you a video when it's time."

Little Princess Lu Ying listened to her parents' instructions for a long time, and finally said goodbye to Lu's father and Lu's mother a little impatiently, and urged Lu Yi, who was watching the play next to her, and said: "Brother, let's go, if you don't catch the plane, be careful Sister Yashan, they won't spare you." ”

"Xiao Yi, take care of my sister."

The brother and sister walked out of the door, Lu's mother still shouted to Lu Yi uneasily, and after getting Lu Yi's affirmative reply, she closed the door with Lu's father a little melancholy and walked to the balcony.

Year 13, the flavor of the New Year, which is getting weaker and weaker year by year, has completely faded at this time, and after coming back for more than half a month, Lu Yi has participated in a few parties and entertained Zhang Liang, and after they played at home twice after the New Year, almost all of them were otaku at home, reading books at home, and making scientific research plans.

On the contrary, the little princess Lu Ying has been on the show, with the new mobile phone and new tablet bought by Li Yashan and several people, and the red envelope money given by Lu Yashan's brother, she has been crazy until the eighth day of the Lunar New Year, after staying at home quietly for a few days, she is urging to leave.

It was now past one o'clock at noon, and the Lu Yi brothers and sisters were going to Meixian Airport to catch a flight to Beijing at five o'clock in the afternoon.

"Brother Liangzi, Sister Lin Qian."

Walking downstairs, Zhang Liang drove the car to send Lu Yi and his sisters to the airport, the little princess ran to the front of the car and said hello happily, and then put the suitcase on the upstairs balcony Under the gaze of Lu's father and Lu's mother, the brothers and sisters got in the car and rushed to the airport.

"Lu Lu, have you set off? I'm ready to board. ”

"I'm going to go to the airport, and if the flight is not late, I'll be in Beijing at eight o'clock in the evening."

As soon as the car drove out of the community, Lu Yi received Zhang Qing's WeChat, Li Yashan was already in Beijing for the New Year, and Professor Lin was that the plane had taken off at noon and would arrive in less than half an hour.

Now there are only Lu Yi brothers and sisters and Zhang Qing left, one took off from Meixian and the other took off from Shancheng.

After chatting with Zhang Qing for a few words, Lu Yi opened Li Yashan's WeChat: "Yashan, have you arrived at the airport?" Little Dream should be almost here. ”

"I've arrived, just parked the car, be careful when you drive over there, don't worry about me." Li Yashan replied with a message, everyone is not familiar with Kyoto, so she will come to pick up the airport.

"Hmm." Reaching out and pushing away the head of the little princess Lu Ying, Lu Yi replied with a hmm, turning off the phone screen.

"Brother, should I prepare some gifts for Sister Yashan?" Peeking at the chat between her brother and her possible future sister-in-law, Lu Ying's little princess rolled her eyes and seemed to think of something.

Lu Yi glanced at his sister, and didn't know what she was thinking, so he closed his eyes and said, "Mom is ready in the suitcase, and you can give it to your sister Yashan when the time comes." ”

After knowing that Li Yashan, Lin Meng, and Zhang Qing went to Beijing together, Lu's father and Lu's mother had already thought things through, except for Lu Yi's two sets of clothes and a laptop, the rest of the big suitcase was stuffed with various Hakka specialties, if Lu Yi hadn't stopped them, it was likely that even the gifts for Li Yashan and their parents would have been prepared.

"Lu Lu, who is Yashan? Isn't it Professor Lin Menglin? ”

Zhang Liang, who was driving, heard the conversation between the brother and sister, and asked with some doubts, he only knew Professor Lin who had been exposed on the Internet, but he didn't know Li Yashan and them.

"In addition to Sister Lin Meng, there are also Sister Li Yashan and Sister Zhang Qing, the three sisters are my alternative sisters-in-law."

Lu Yi didn't answer, but Lu Ying said it proudly, she admired the relationship between her brother and Lin Meng, if it was an outsider, she would think that it was a beast, but as a family member, it was natural to Lu Yi, and she would only feel proud in her heart.

As for who Lu Yi is with in the end, Lu Ying's little princess and Lu's father and Lu's mother will not interfere, the little princess thinks that her brother is very powerful, Lu's father can't hurt others through education, and Lu's mother is simply thinking that the best three of them are her daughters-in-law.

"Three?"

The green light in front turned red, Zhang Liang released the accelerator and slowly removed the brake to stop, and then continued: "Professor Lin, they all know this situation? ”

"Of course!"

Lu Ying said proudly, and then asked, "Brother Liangzi is very envious?" ”

"Envy...... Ah, don't envy, what do I envy! It's enough for me to have your sister Lin Qian alone, and God has been very kind to me. ”

Zhang Liang subconsciously replied, and instantly felt a killing flash next to him, so he reacted and hurriedly changed his words.......

At 4:10 p.m., Zhang Liang sent the Lu Yi brothers and sisters to Meixian Airport, and on the way, the news that Professor Lin had arrived safely and joined Li Yashan had already been sent.

Princess Lu Ying, who has never been to the airport by plane, followed Lu Yi's side, looking around the airport like a curious baby, and after Lu Yi took the boarding pass from the automatic check-in counter, she took out her mobile phone for the first time and took a photo to post it on Moments.

The brother and sister had passed the security check time at half past four, and when they were waiting to board the plane after registration, Lu Ying stood curiously at the glass window and looked at the plane that was taxiing and taking off, and after carefully looking at a few planes, she whispered to Lu Yi: "Brother, isn't this plane a jet, why don't you see an engine jet or a fire?" ”

"Not all jets breathe fire, and the engine of a civil airliner is a large ducted turbofan engine, and the main source of power is low-temperature compressed air from the outer duct, rather than high-temperature combustion air from the internal duct.

The phenomenon of fire-breathing can be mainly caused by insufficient combustion of the connotation road, and the fuel of the civil aviation engine is not directly injected after combustion, but is discharged after the work of the heavy compressor, and the fuel has been completely burned when discharged, and the temperature has been reduced, so you can't see the phenomenon of fire-breathing.

In fact, not only civil aviation engines cannot see the phenomenon of fire, but also fighter engines cannot see the phenomenon of fire-breathing when they are not in a high-horsepower state.

In addition, the thermal efficiency of civil aviation engines is higher than that of fighter engines, and the same fuel civil aviation engine can obtain more thrust, and the compressed air is output as much as possible in the engine, so there will be no violent jet phenomenon. ”

Lu Yi turned the notebook to a new page, and randomly drew a schematic diagram of a civil aviation engine and a fighter engine on it, and drew air flow lines and a simple work diagram on it, explaining to his sister the difference between a civil aviation engine and a fighter engine.

"What about the space rocket engine?" Lu Ying nodded as if she didn't understand, blinked her eyes and continued to ask curiously.

"The space rocket engine is also a type of jet engine that uses the impulse principle, but unlike the jet engine in the atmosphere, it has its own propellant and does not use outside air.

When the fuel is burned in the combustion chamber, the uneven pressure will produce a part of the kinetic energy, and when the high-temperature gas generated by the combustion chamber enters the conical or bell-shaped nozzle, the pressure will expand, and the expanded pressure will be converted into thrust when it acts on the inner wall of the nozzle......"

Lu Yi drew a simple schematic diagram of the rocket engine in his notebook, and from childhood to adulthood, as long as his sister asked questions about knowledge, he would do his best to explain and answer them.

It can be said that he was admitted to CUHK, and there is part of the credit of Princess Lu Ying, because all kinds of strange problems from his sister forced him to look for information, so as to stimulate a stronger desire to learn.

"Host, your sister's scientist potential has increased, from 79 to 82.2."

Suddenly, the system made a prompt sound in Lu Yi's mind, and the content of the prompt made Lu Yi directly stunned.

82.2 Scientist Potential in the First Year of High School?

Lu Yi's heart was shocked inexplicably, you must know that he has been hanging over his head for the past few months, and he has devoted himself to study and research, and the potential of scientists has not exceeded 90, and his sister who has been mischievous Lu since he was a child now has 82.2.

From the system, he already knows that everyone's potential as a scientist is different at each stage and at each stage of learning, and will change with age, mental focus, personality thinking, and the amount of knowledge mastered.

After this period of data collection and analysis, Lu Yi determined that the potential value of the undergraduate study stage was the most stable, when the thinking mode was almost fixed, the personality had been steadily formed, and the amount of knowledge had reached the threshold of scientific research.

Now my sister is still in her first year of high school and has reached 81.2, and it is foreseeable that the knowledge of studying undergraduate level will definitely not be less than 90, if you can put away that playfulness and focus on learning and research, it may not be able to reach the level of Lin Meng and Zhang Qing, and even surpass.

Could it be that a great scientist is going to appear in our Lu family?

It's just that when he saw that he had finished explaining the general knowledge of the three engines, the little princess Lu Ying, who had satisfied his curiosity, ran to the window to watch the plane take off and land, and the happy smile made him put away his intention to strengthen discipline and cultivation again.

I was cheated by the system and embarked on the road of scientific research, but my sister still let her grow up happily and choose her own life......

"System, you're not honest."

With a decision in his heart, Lu Yi began to find trouble with the system in his mind.

This low forcing system usually does not meet people with a score of more than 85 and will not take the initiative to speak out at all, but now he suddenly told himself about the change in his sister's scientist potential, which is obviously ill-intentioned.