Li Congwen laughed and said with both hands: "You have a criminal record. That time I took you to Xisha for an internship. A summary of 5,000 words, of which 3,000 words are difficult, and there are two thousand words left.

It’s you that you are exaggerating how to solve the difficulties. There are less than a hundred truly meaningful words in total.”

Li Xuan smiled and blew gently at the teacup, "Originally, the experience of that internship can be explained clearly in one sentence. You have to ask me to write 5,000 words. If I don't write this way, we can't sit on the road.

What kind of transportation do you have, what you talk about, and what you eat, are you writing a summary of what you eat?"

Li Congwen snorted softly, "Are you finally willing to admit that you are dealing with me?"

"Then I dare not." Li Xuan kept laughing dryly.

Li Congwen smiled and shook his head, "Now I believe you have really done well this year, and you are even more confident in speaking than before."

Li Xuan complimented: "It's your teacher who taught you well."

"I have taught countless students. It's not a boast of saying that they are full of students. There are so many students, and there are indeed many students, but in the end, I returned all the knowledge to me. You don't have to face me.

It’s your own ability to make money by posting the gold," Li Congwen waved his hand.

Li Xuan nodded, he knew that what Li Congwen said was the truth.

Li Congwen has a special status in Ocean University. In addition to being the title of class teacher in undergraduate colleges every year, he also teaches graduate students. In addition, he also holds the title of a serious professor in two other schools related to marine biology in China.

.

Although he almost never goes to the class he takes on and handes all the things in the class to the counselor, as long as he doesn't run to the sea, he will stay in school most of the time. If the students he takes on are to

When he comes to him, he will meet with the other party and never stings with advice.

Given Li Congwen's status in marine biology, I have long heard of such compliments, and there is no need for Li Xuan to gild his face.

Moreover, with Li Xuan's current achievements, Li Congwen is not considered a gift.

"Teacher, I just saw that you were making a form. Are you recording any research report?" Li Xuan asked.

Li Congwen nodded. He took out a pack of dried coconut meat slices from the pocket on the inside of his shirt, took a few pieces out of it and stuffed them into his mouth. "There are new discoveries in biological structure materials abroad, and they passed

The hard and soft components are assembled into complex hierarchical structures, achieving excellent mechanical properties."

"China thinks that continuing to study according to this idea can provide rich inspiration for synthetic materials, so I handed over this task to me. I don't have detailed information to assist me. The idea is quite confusing. Now I'm confused and I don't know what to do.

Where to start, I want to make a detailed plan first, and use conch shells as the entry point for research. Conch shells are one of the interesting but less studied biological materials, because they exist on nano-to-macross scales.

The cross-layered structure has about ten times tougher than the widely explored mother-of-pearl."

Li Congwen seemed to be intentional about taking the school entrance exam, and said a lot of professional terms, and kept staring at Li Xuan's eyes while speaking, wanting to see if Li Xuan had already learned everything he had learned from him.

All were returned to him.

Fortunately, Li Xuan has a good memory. When he was in college, he also learned some real skills. After graduation, he applied what he learned and applied his whole body to his actual work, and constantly passed things to verify his own. What you learned.

"Teacher, did you start the project of conch shells many years ago? I remember three years ago, you used 3D printing technology to start printing biological materials that mimic conch shells." Li Xuan said in confusion.

Li Congwen shook his head, "Have you heard of Rupert's tears?"

"Well."

Li Xuan uttered, then said embarrassedly: "I heard that, but I didn't learn it from textbooks, I saw it on some short videos, and I don't know if it's accurate. It is said that this is the hardest in the world. Something."

"Tell me," Li Congwen said with great interest.

"I heard that when melted glass is naturally dripping into ice water by gravity, it will be shaped

Some tadpole-shaped glass tears, these glass tears are commonly known as Rupert's tears. The tears themselves are much harder than ordinary glass and can not break under the pressure of eight tons. However, if you catch them, Hold on to its slender tail and apply some pressure a little, then the entire glass tear will burst and splash and completely shatter." Li Xuan said.

Li Congwen nodded slightly, "Continue."

Li Xuan was stunned for a moment, "Teacher, don't know what you want me to continue saying?"

Li Congwen said: "The physics, chemical phenomena, and principles of Rubes' Tears."

Modern scientific research, no matter which discipline it is, is inseparable from physics and chemistry. This is all scientific research, even marine biology is no exception.

People who understand physics and chemistry do not necessarily understand biology.

People who understand biology must understand physics and chemistry.

Li Xuan didn't understand why Li Congwen suddenly asked him this. In fact, Li Xuan knew scientific principles such as Rupers, but after pondering for a while, Li Xuan shook his head and said, "Teacher, I don't know."

Li Congwen was not disappointed, but said calmly: "Although you have been with me for several years, you are not actually a scientific researcher. I don't know that it's not your fault. The principle of Rupert's tear breaking is called crack propagation. Simply put, It stems from the uneven pressure inside Rupert's Tears."

Li Xuan said curiously: "Teacher, aren't we talking about biosynthetic materials? Why did we suddenly talk about Rupers and the like?"

Li Congwen Dandan glanced at Li Xuan, "Because I directly said that you don't understand the biological structure and mechanical properties, so I have to give you a simple example."

Li Xuan showed embarrassment and then smiled bitterly: "It's because the students are not good at studying, which makes the teacher embarrassed."

Li Congwen waved his hand, "Human knowledge is like a circle. All the knowledge you learn is within this circle, and what I study is outside the circle, which has nothing to do with whether you are acquainted in your studies or not. ."

Li Xuan nodded with awkward smile.

Li Congwen continued: "Many years ago, I began to consciously study the special marine creature of conch, and used 3D printing technology to replicate similar synthetic biological materials, but the effect was not as good as I imagined. In fact, This principle is the same as Rupers' Tears."
Chapter completed!