Winters in Riverside City are cold, and when you walk outside, the wind is biting.

But it doesn't have to snow, and in Su Yuan's memory, Binhe City, like her hometown of Haizhou, hasn't snowed for a long time.

In my childhood, I had the image of heavy snow falling almost every year, and after entering the new millennium, the city has developed rapidly, but snow has become a luxury.

In recent years, perhaps due to the abnormal weather, snowflakes have once again drifted over Riverside City.

Monday, December 3rd.

At the beginning of the new week, sitting in the cold classroom, Su Yuan quietly listened to the teacher's lecture on it, she stomped her feet, and was very glad that Su Caiwei sent her a pair of warm shoes with cotton wool inside when she sent the supercomputer.

The warm shoes fit the right fit, and the toes are warm and very comfortable.

The only thing that is not good is the color, which is actually red!

The inner layer is yellow, the outer layer is bright red, and it clatters when you walk, like leather shoes.

It's not that Su Yuan hates red, she herself is not averse to red, and even bought a watermelon-red coat and a red leather jacket herself. After all, it's clothes, and it's not strange to be bright, but red shoes are a bit unusual.

Angry Bird shape, fat red bird staring at round eyes, yellow beak sharp protruding forward. is cute, but her "IQ" is vaguely pulled down.

The classroom was full of people, and it slowly warmed up after a long time, Su Yuan propped up one hand on the table, turned a pen in the other, tilted his head against the palm of his hand, and yawned. sniffed. Instead of looking at the blackboard, he looked at her spinning pencil.

"Su Mengyuan. Answer that question!"

The teacher of "Microbiology" was finally angered by her snubbing, even if she had good grades. People are beautiful, and they can't desert in class so grandly.

"Ah!" Su Yuan was startled when he heard his name. I looked at the blackboard for the first time, but I saw a lot of things densely written on the blackboard, and I didn't know what the problem was that Teacher Lu Dao was talking about.

There are two things that deserted students are most afraid of, the first is that the teacher calls their name, and the other is the teacher's sentence "Let's ask a classmate to come up and do this question".

Su Yuan sat on wax, her delicate face was at a loss, and she hurriedly lowered her head. Glancing at Ji Ye Hao next to him, he kicked his foot with her red shoes, "Hey, what was the problem just now?"

“PCR！”

“PCR？”

Su Yuan was stunned, and quickly reacted, what Ji Yehao said should be polymerase chain reaction, but is "PCR" the answer, or is it a requirement to say the content of PCR?

"Su Mengyuan. Give your answer quickly. The teacher on the podium became impatient, and his angry gaze shot straight at him.

"It's miserable......" Su Yuan snorted his mouth, crying bitterly in his heart. A dead horse is a live horse doctor, coughing lightly. She resolutely said, "PCR!"

"Well, yes, but what the teacher asked you is. What is PCR!"

"There is!" Su Yuan was overjoyed, the most important thing for her now was that she didn't know what the problem was. Now that you know the problem, why be afraid next. She straightened her chest and said in a clear voice: "PCR technique is a technique that uses Taq enzyme or Pfu enzyme to act in a suitable pH buffer solution, using target DNA as template and dNTP as raw material to replicate a large number of target DNA. ”

The teacher nodded, but obviously didn't want to let go of the deserted student easily, and said quietly: "Be detailed." ”

"Uh......"

Su Yuan thought that he could sit down, but he didn't expect the teacher to embarrass her, so he held his breath and said: "PCR includes three processes: DNA denaturation, primer annealing, and extension, and the most important thing is primer design, the 5' end primer is the same as the target DNA sequence, the 3' end primer is complementary to the target DNA, the temperature rises to 95 degrees during denaturation, the annealing drops to 60 degrees, the extension is raised to 72 degrees, the extension process extends from the 5' end to the 3' end, a cycle takes 2 minutes, and after completion, it enters the next cycle, and the PCR is tested after the end." ”

"Well, yes, sit down and listen to the lecture. ”

The teacher didn't embarrass her anymore, but the last four words undoubtedly made her lose face in front of the whole class, and Su Yuan was so angry that she had to sit down.

"Why is the teacher so difficult to deal with today?" After class, Su Yuan lay on the table and moaned.

"Who made you desert, half of the people in our class failed in the midterm exam, and the teacher was angry. ”

"But I passed, and the grades were very good!"

Su Yuan sat up suddenly, looked at the noisy classmates around him, and sighed that he had been dragged down by them.

Ji Ye Hao saw that her eyes narrowed slightly, as if he had guessed what she was thinking, and couldn't help but rub her head, "Hey, your hair has finally grown, just fix it in the future, don't cut it." The silky strands of hair ran between the fingers, and although it was not very long, it seemed to cover the ears and the neck a little. As for the front, the bangs are straightened so that they can barely touch the lips.

"I know whether I cut my hair or not, why should I listen to you?"

When Ji Ye Hao began to play with her hair, Su Yuan's brows frowned slightly, but the light rubbing action made her very comfortable, and she didn't bother to pay attention to him, who knew that Ji Ye Hao became more and more presumptuous the more she played, her hair pricked her cheeks itching, and finally slapped his hand off when he straightened his hair and accidentally touched her lips, glaring: "Why are you so boring, what's so fun about hair." ”

Ji Ye Hao smiled, ignoring her anger.

"Hmph......" She turned her head and leaned on the table with her textbook in her hands, squinting and taking a nap. Ji Ye Hao, on the other hand, has been gently playing with her hair.

……

……

The green ants are brewing new wine, the red clay is a small stove, the sky is gloomy, and a small snowflake has faintly floated.

Five o'clock in the evening.

Base.

Su Yuan, Ji Ye Hao, Gao Jun, and Xia Linfeng sat around the small bonfire, the warm firelight illuminating their faces, and there were no flashy words. The wafting aroma of meat emanates from the large pieces of lamb that are sprinkled with cumin and hot sauce. Su Yuan hurriedly put the mutton on his plate.

"Ahh

She kept swallowing her tongue. Grabbed a drink next to him and drank it.

Today is not a holiday, but it is a special day, because today is Charlene's birthday. At Gao Jun's suggestion, they set up a bonfire under the small shed outside the laboratory, and all kinds of meat and vegetables were bought from the supermarket, ready to celebrate Charlene's birthday happily.

The cake I bought was not very big, and if it was divided evenly, it would be enough for four people to have a piece, but it was enough. Because today's theme is barbecue.

"Su Yuan, give!" handed over the large piece of beef that had just been roasted, and Su Yuan stretched out his plate to pick it up.

"Ye Hao, don't you eat it yourself?"

Ji Ye Hao patronized the barbecue for everyone, but he rarely moved, Su Yuan was a little embarrassed after eating several pieces, her eyes rolled, and she said, "I'll bake a piece for you." As he spoke, he chose the largest piece of meat, skewered it with a steel fork, and roasted it on top of the red flame.

Barbecue. It's simple.

After a while, the tender piece of meat turned white and yellow, and Su Yuan hurriedly turned it over, but a few minutes later. The edges of the piece of meat have turned black, and then I cut the inside with a knife to look at it, but it is not fully cooked.

"Huh?" Su Yuan turned his head. Laughing, she doesn't look at her results subjectively. This piece of meat looks undercooked, but it is actually cooked. With a light touch, he put it on Ji Ye Hao's plate with great satisfaction.

"Eat it, dip it in some sauce, it must taste good. ”

Xia Linfeng saw the black things on Ji Yehao's plate, and couldn't help but say, "Can this piece of coke still be eaten?"

"Of course you can, remove the skin, it's still tender inside, chicken flavor!"

"Nonsense, what you chose was a piece of chicken!Do you still expect Ye Hao to eat the flavor of beef?" Gao Jun rolled his eyelids.

"Okay, okay, Su Yuan is right, it's dark outside, and it's uncooked inside, so if you peel it out layer by layer, there must be an area that is just right. Ji Ye Hao said with a chuckle.

"What do you mean, disgusted that I don't make it delicious?"

Su Yuan was angry, she kindly made him a piece of meat, although her appearance was ugly, but it condensed her full sincerity, and in addition to being angry, she made a gesture to snatch the chicken nuggets back.

"Don't be like this, how can you take back the things that have been put on my plate, do you understand politeness!" Ji Ye Hao glared, criticized Su Yuan fiercely, and forcefully put a piece of freshly roasted meat on her plate. The latter stared, pursed his lips, and suddenly laughed, "Eat, you eat this piece of coke slowly, Sister Xia, let's eat the cake!"

As he spoke, he took out the cake and carefully cut it into four pieces.

"Sister Xia, make a wish!"

A candle the size of a little finger was inserted in Charlene's cake, and Lala handed it over.

Charlene grimaced, this is also a birthday cake, but then, she smiled, looked at the snow in the sky, and blew out the candles.

"Come, tell me what you have wished?"

"I hope we can all live happily together forever!"

Su Yuan was stunned and said unexpectedly: "Such an unpretentious wish?"

"Then what do you think you should wish for?" Charlene looked at her and smiled, then her eyes fell on the slowly burning bonfire, and said profoundly, "Sometimes, this simplest and least ambitious wish is the most difficult to achieve. ”

"Papapa......" The applause rang out, Xia Lin was stunned, but saw Su Yuan pick up a digital camera that had been prepared and ran to a short distance to set it up, click, and the four of them stood together and were photographed.

For about half an hour, Su Yuan raised his body backwards on the bench, touched his stomach, felt that he had been padded, and let out a sigh of praise with satisfaction.

Extinguishing the charcoal fire, she said idlely: "It's only eight o'clock, are we going back?"

"Wait, I have four movie tickets here, let's watch a movie together in the evening!" Charlene took out four movie tickets from her jacket pocket and handed them out to everyone with a smile.

"Strange talk movies - flirtatious ghosts, horror films, are there any domestic releases?"

Su Yuan looked at Xia Lin in surprise.

"There are movie tickets, of course there are releases! It's just midnight, so keep a low profile. ”

"Midnight file?" Su Yuan smiled, she thought that midnight files were all movies that could not be used by outsiders, it turned out that horror movies could also be placed in the midnight file, three watches in the middle of the night, it was scary enough, and it was still a horror movie. She couldn't think of the mindset of the people who watched the movie. (To be continued......)