"Do you understand this?"

A female voice suddenly sounded in her ears, her voice was soft and glutinous, with a hint of the unique taste of Jiangnan women. Pen @ fun @ pavilion wWw. ｂｉｑUｇE。 ｉｎｆｏ

Zhou Chen turned his head and found that the girl next to him was curiously pointing to the periodicals and magazines in his hand.

At this point, the page is a dense patch of English sentences, and in addition to the text, there are several sets of tadpole-like partial differential equations.

Yang Xi was very surprised, he didn't expect that the boy next to him could actually understand the pure English version of the journal and magazine. She knows that this kind of professional magazine is a test of a person's English proficiency. In particular, there are complex partial differential equations, which can be seen at a glance as being related to science and engineering.

"Hmm." Zhou Chen nodded in affirmation.

"You're amazing!" Yang Xi sincerely admired.

Although her academic performance in school is also excellent, she always has a headache every time she encounters complicated formulas in textbooks.

In contrast, Yang Xi admires those who can understand complex formulas very much, in her opinion, those people's heads must have a very special structure, otherwise how can they understand those non-human "languages"!

"Hello, my name is Yang Xi, I am a junior at Beijing Normal University, and I am going home for the summer vacation this time." Yang Xi smiled, like a blooming orchid in an instant, elegant and lovely.

"Hello, my name is Zhou Chen, University of Science and Technology of China, and I am also going home this time." Zhou Chen smiled and reported to himself, "But I didn't go back after the summer vacation, I have already graduated." ”

Yang Xi was a little surprised, and asked curiously: "Undergraduate students of USTC?" ”

"No, graduate student." Zhou Chen corrected with a smile.

Yang Xi was even more surprised, a pair of bright eyes couldn't help but widen slightly, and her gaze fell on Zhou Chen's face, as if she had discovered a new world, she really didn't expect that the person next to her was actually a graduate student.

"You look so young, I thought you were in college like me, and you even finished graduate school......" Yang Xi looked at Zhou Chen's face, sighed with a hint of suspicion, and asked: "Are you sure you didn't skip a grade halfway, and you didn't study a juvenile class or something?" ”

Zhou Chen was dumbfounded, smiled helplessly and said: "Do you see that I look so tender, I am twenty-five years old this year, do you want me to take out my graduation certificate and show it to you?" ”

Yang Xi opened his mouth, shook his head demurely, and said, "You don't need to show me your graduation certificate, I believe you." ”

Immediately, her beautiful eyes narrowed, and she said playfully: "But since you are so much older than me, then I will call you Brother Zhou!" As for you, call me Xiaoxi, or Xi'er. ”

Zhou Chen smiled, feeling that it was very interesting to the little girl in front of him. For a while, it is tranquil and natural like a clear spring, and for a while it is naughty and lively, like a child who has not grown up, anyway, his journey is still very long, it is better to talk to her, not to mention that the other party is still a beauty.

"Brother Zhou, you look so young, you must have a special maintenance method, right?" Yang Xi said as he looked at him expectantly, as if he had regarded Zhou Chen, a stranger, as his friend.

There is no woman in this world who rejects beauty, and whenever they have the opportunity, they will try to make themselves beautiful. At least any wise woman never lets her appearance be too bad.

"Hehe, there is no special maintenance method, it may be that you are born young." Of course, it was impossible for Zhou Chen to tell her about the gene fluid, so he made up a reason to prevaricate.

Yang Xi didn't know what Zhou Chen was thinking, thinking that there were indeed a few living examples in the entertainment industry, so he believed what Zhou Chen said, and felt a little regretful in his heart.

There is a saying that one person's journey is lonely, but when two people are together, there can be countless topics.

The facts did verify this, and in the following journey, Zhou Chen and Yang Xi went from strange to familiar, and chatted happily with each other about some trivial things.

From the customs of his hometown to the anecdotes of various places, Zhou Chen successfully used his good eloquence and profound knowledge to bluff Yang Xi, which effectively aroused the interest of this little girl.

Yang Xi's hometown is also from Taizhou, and coincidentally, the two are still in the same district, but the streets they belong to are different. The relationship between the two has also become a lot closer because of this.

"By the way, Xi'er, you're a student of biology, right?" Zhou Chen found a topic and said.

"Huh, how do you know?" Yang Xi glanced at him suspiciously.

Zhou Chen smiled and said, "I saw you watching "Bioreaction Engineering" before, so I guess you are a student of biology." ”

"Oh!"

Yang Xi suddenly realized and said, "Brother Zhou guessed correctly, I am a student of biology, and I will be shunted to a biotechnology major next semester." She then chatted about some interesting things in the school, and expressed strong dissatisfaction with the school's admissions in biology, roughly blaming the school for having so few undergraduates that she had few close friends in the school other than her roommates.

Zhou Chen didn't know much about this, and it was not good to express his opinions, but he only listened to Yang Xi tell him, only to know that the biotechnology major of Beijing Normal University was a professional course under the School of Life Sciences, and the freshman year was unified through the "life science and technology" discipline wide caliber enrollment, a total of 70 people were recruited, the first two years received general education and discipline basic education, and after two years of training, the students independently chose to enter the two major directions of "biological science" or "biotechnology", that is, two majors were divided into the third year.

Yang Xi chose biotechnology, a total of one class, full of thirty people.

Isn't it because I have very few friends, and it's the school's fault that I think about it?

Immediately remembering something, she bent down and rummaged through the bag she was carrying, and took out two books. One of them was "Bioreaction Engineering" that she had read before.

Under Zhou Chen's puzzled gaze, Yang Xi complained: "Brother Zhou, you don't know, this "Reaction Engineering" is so difficult, although there are many contents that I know how to apply during the exam, but I don't know why I can't understand the principle things thoroughly. ”

She had a bitter face, looking at the book with a bitter expression.

Zhou Chen smiled heartily and said, "I know what it is, but I don't know why." It means that your cultivation has not yet reached home, and it seems that you still need to work harder. ”

"I understand the reason, so even if I have a holiday, I still take my textbooks to study." Yang Xi nodded.

"You'll figure it out if you work so hard." He could see that Yang Xi was a girl who looked weak on the outside, but was actually very self-reliant, and only such a girl would study with a textbook when she was on the train.

The only thing Zhou Chen can give Yang Xi is encouragement. Many things can only be gained if you work hard, this is the experience that Zhou Chen summed up from his own side.

Yang Xi nodded and said: "I'm not afraid of "Reaction Engineering", there is nothing difficult in the world, only afraid of people with hearts!" But another class is a bit of a hassle. As she spoke, she showed off another book in her hand, which was called Inorganic and Analytical Chemistry.

"What's wrong with this class?" Zhou Chen asked in surprise.

"This book talks about the quantum hybrid track, just like an old lady's footwrap, it's smelly, long, and complicated, I can't take it, I don't even know how to apply it during the exam!"

Yang Xi looked at it with a look of antiquity, and he couldn't wait to tear up this book! This time, it didn't even reach the "knowing it", which means that even the threshold has not yet been reached.

As a good student with excellent character and learning, this class simply tortured her too miserably. She has always thought that in those outstanding girls, she can generally find the charm and beauty of "talent is better than immortals, and her temperament is as beautiful as an orchid", of course she is not willing to just exist as a vase, and finally found an outlet, so she complained to Zhou Chen in a hurry, completely forgetting that she and the other party had only known each other for a short time.

Zhou Chen listened silently and became a loyal listener. He is a person from the past, and he understands this kind of need to vent too well.

I remember that when he was in college, he also encountered several extremely difficult courses, which had a common feature, that is, it was not necessary to torture people, but it was not good if he didn't study them. It tastes like someone tied up on a fire, and the fire below you is scorched on the outside and tender on the inside, not to mention how ecstatic it is.

He had heard a senior in the mathematics department of chaos laugh at himself, and at first he thought he was studying chaos, but he didn't expect that he would end up learning chaos instead. It can be seen that when encountering this kind of brain-burning discipline, if you don't sort out your ideas well, you will be in a mess when you learn.

Of course, Zhou Chen had not been exposed to "Biological Reaction Engineering" and "Inorganic and Analytical Chemistry", but after listening to Yang Xi's complaints, he specifically learned about these two courses through Dandan. Subsequently, he could roughly understand Yang Xi's mentality.

The course "Biological Reaction Engineering" is very difficult, the difficulty is that it has a lot of formulas, and most of the formulas involved are very complex, what material transfer, energy transfer, reaction kinetics, etc., if there is no effective learning method, it is indeed very troublesome.

As for "Inorganic and Analytical Chemistry", it is the opinion of the benevolent and the wise, and the rest of the parts are okay, and it is not difficult to say that it is difficult, but the quantum hybrid orbital part has really killed a large number of students.

This kind of content, which involves both physical chemistry and quantum mechanics, can be said to challenge students' understanding of reality to a great extent. It's like one day someone suddenly tells you that the world you live in is false, can you accept it for a while? Even if you accept it, will you be less hit?

Science is constantly evolving and innovating, and new knowledge is constantly building on old knowledge, some of which are inherited and carried forward, while others seem more like subversion.

To a certain extent, the theoretical basis of quantum hybrid orbitals is contrary to the "common sense" learned in the past ten years, and in order to learn it, we must first break the "material model" accumulated in the past ten years and "upgrade" the world's cognition.

In the past, we said that the atom is made of the nucleus and the electrons outside the nucleus, but here, it tells you another fact: there are no electrons outside the nucleus, it is an electron cloud, which is a probabilistic distribution state. It is only when the observer observes the atom that the electron cloud is observed in the form of an "electron" at a certain location.

And these electron clouds are also called wave functions, and their locations are called atomic orbitals, and bizarrely, these orbitals can be hybridized. That is, merge with each other!

Previously, we could just say that a chemical reaction is when two atoms are close to each other, and then each provides an outermost orbital of electrons to form a "common electron pair" to form a chemical bond. But orbital hybridization, it's not that simple.

In short, it is no longer the concept of "atomic orbital" in the traditional sense, but a new and more complex theoretical model. Moreover, this course also requires learners to have strong spatial logic imagination ability!

Zhou Chen didn't know how to comfort Yang Xi, he said that there is no end to learning, Zhuangzi once said, there is a cliff in my life, and there is no end to knowledge, so there is no end to the cliff, and it is gone.

What does that mean? It means that life is limited, but knowledge is infinite and has no boundaries, and the pursuit of infinite knowledge with a limited life is bound to fail. Show that you should not be absolute, but only in moderation. There's always something you can't reach, so why be demanding.

Fortunately, Yang Xi is not the kind of girl who drills the horns of the bull, otherwise no matter how strong Zhou Chen's mouth is, I am afraid it will not play a role.

The long journey continued, and under the red fluttering sunset, Yang Xi, who had been excited for a long time, finally felt tired, she leaned back in the chair, her chest rose and fell slightly, and soon fell asleep.

Seeing this, Zhou Chen smiled slightly, picked up the English version of the journal and magazine and continued to read it.

……

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