Chapter 61:

Chapter Sixty One
Xiao Yiheng first explained to Youyou how Archimedes discovered the principle of buoyancy during the (xi) bath, and this principle is actually the same as the essence of Cao Chong's statement. +++ Catino Novel Network EbookFREE.me
Youyou had never heard of Archimedes, but Cao Chong said that she still knew it! "Cao Chong Said Elephant" is a compulsory content in the primary school textbook, but the Chinese class emphasizes Cao Chong's wisdom and wisdom, while Xiao Yiheng talks about the physical principles.
Youyou didn’t know until today that Cao Chong started to study physics at a very young age, and the ancient little friends are too poor.
"In short, the buoyancy of an object is equal to its own gravity." Xiao Yiheng dipped his finger in the water and drew a simple stick figure on the shore. The stick figure was a stickman in a swimming skirt, which looked like a pomelo.
He drew the pool, the stickman pomelo, and then drew a vertical upward arrow on the stickman's stomach.
And this is the force analysis diagram of pomelo swimming.
Youyou seem to understand or understand "Brother Xiao, you mean, when I was swimming, an invisible hook lifted me up?"
Xiao Yiheng "...not a hook, it's buoyancy."
"Does the elephant also have this hook?"
"..." Xiao Yiheng retreated, "Yes."
"Then why the hook didn't lift the elephant, but it could lift me."
"Because the density of elephants is greater than that of water."
"Density? What is density?"
How did the ten-year-old friend know what density and buoyancy, Xiao Yiheng explained for a long time, the more you listened, the more confused you became.
You are tired and don't want to fight anymore.
"Brother Xiao, I really don't understand what you are talking about." Grapefruit hugged the neck of the flamingo pontoon and said aggrievedly, "I can't see the hook either."
Xiao Yiheng tried his best to explain, "The hook I mean is that the buoyancy is not visible to the eye, it is what makes you feel."
"But I can't feel it!"
Li Cheng was in the audience for ten minutes, watching Xiao Yiheng drawing the stress analysis diagram and talking about the density formula. He was busy for most of the day, but the progress was negative. Looking at the pomelo, the two big eyes are covered with two of tears, which are more pitiful than the little day lily in the ground.
After all, Pomelo is only ten years old, so multiplication and division are not good enough. Xiao Yiheng still wanted to make Youyou understand the stress analysis diagram that Li Cheng couldn't understand. This is not difficult for (强qiang) people.
Li Cheng could not bear the smoke from his brain. He jumped into the water, walked quickly to Xiao Yiheng's side, told alha to let them go, and stop reading those heady formulas. "Whether there are so many messy things in swimming? Calculate the buoyancy formula in your mind? Swimming is an instinct, you have said so much, do you know how to swim?"
Xiao Yiheng was silent for a long time unexpectedly.
Li Cheng! ! !
Li Cheng was shocked, "oc, you really can't swim, do you?"
He thought Xiao Yiheng was the king, but he didn't even think that Xiao Yiheng was inferior to bronze.
Xiao Yiheng eloquently said, "Good gourmets don't necessarily cook; good film critics don't necessarily make movies..."
"But a good swimming coach will definitely swim!" Li Cheng interrupted his sophistry, "Okay, Xiao Yiheng, you can stand me by the pomelo pomelo! My brother Li doesn't believe in this evil, isn't it just swimming? , I will definitely teach you two today!"
So Li Cheng changed from teaching one person to two people.
No, it's not a person, but two pigs.
No, pigs are so cute, and they are born to swim, how could he use these two unwitting elm heads to insult the cute pigs?
Li Cheng once thought that a student like Xiao Yiheng must be proficient in everything. In addition to drawing and doing problems, he should be good at all kinds of sports. How could Xiao Yiheng not be good at things like swimming? Will it?
Xiao Yiheng smiled bitterly, "Remind, there is no causality (guan) relationship between'I am a Xueba' and'I can swim'."
Li Cheng barked out her little tiger teeth fiercely. "So what constitutes a causal (guan) system?" Can the relationship between "you learn to swim" and "I'm going to be stupid by you" constitute a causal (guan) system? "
"..."
Li Cheng looked at the two land ducks in front of him with his hands on his hips, and issued orders with a serious face.
"I'll count one, two, three." Li Cheng said, "you dive down together and hold your breath. Be careful, don't just squat straight down, bend your legs slightly, bend over and bury your head in the water. You must relax (body) Shen) body, especially to relax the waist and abdomen, feel that something is holding your lower body up to the water. As long as your hips float up, your legs will naturally float up!"
"That's not'something'," Xiao Yiheng corrected. "That's'buoyancy'."
"That's not ‘something’," Youyou pomelo had to learn, "That’s a ‘little hook’."
Li Orange said stiffly, "No matter what it is, you have to hold your breath for one minute under the water... Forget it, hold your breath for 30 seconds first."
"Thirty seconds is so long." Yuyou said nervously, "what if I choke on water."
Li Cheng comforted her, "Don't worry, my brother is here to guard you, my eyes will never leave you. And I have been a lifeguard training, you are really choking, my brother will give you artificial respiration."
Upon hearing the "artificial respiration", the little master Yuyou seemed to cover his mouth, and said "Hey, that's fine!"
Li Cheng "..." When the older brother was rejected by the younger sister, is there any reason for this?
Under Li Cheng's iron-faced deterrence, the two swimmers stood up slowly, holding a sigh of relief, and plunged into the water.
Li Cheng counted them, one, two, three...
I don’t know if it’s because of Xiao Yiheng’s accompany with Youyou this time. Under the surface of the water, the little girl’s body gradually relaxed, and her waist gradually floated. Then her buttocks, legs, and feet moved upward one by one. Supported by water!
She stretched her limbs and closed her eyes tightly underwater, letting the invisible "small hook" drag her to the surface of the water.
It wasn't until the oxygen in the lungs disappeared that she broke her power and came out of the water with a snap, flushing with excitement on her entire face.
"Brother, did you see it!" Pomelo danced, "I learned to swim!"
Li Cheng knocked her head, "You just learned to float, but you haven't learned to swim. Okay, you go to the shore to rest for a while, and then come back to continue practicing."
Youyou got tired after practicing for so long, and got a pardon from her brother, so she immediately jumped ashore. There is a vending machine on the shore, and pomelo dropped coins for a bottle of chilly happy lemon tea.
When Pomelo was free to relax, Li Cheng frowned and stared at the shadow of Xiao Yiheng under the water, his expression becoming more serious.
A minute has passed, and Xiao Yiheng's figure is still motionless under the water, not floating or relaxing, like a heavy stone.
Is his vital capacity so (strong qiang), it is not exhausted now?
Li Cheng was worried that Xiao Yiheng would be able to do so, and quickly walked to him, reaching out to drag him out of the water.
Unexpectedly, before Li Cheng's hand stretched out, Xiao Yiheng, who was tightly under the water, actually grabbed his waist and dragged him into the water!
"⺪, you dare to attack! Grumbling grumbling..." Li Cheng was caught off guard, all the unspoken swear words turned into a series of bubbles.
The shallow water was only 1.2 meters, and when Li Cheng stood up straight, the water overflowed his waist. Because of professional training, Li Cheng did not panic after entering the water, but immediately opened his eyes, twisted his body as quickly as possible, and aimed at Xiao Yiheng's shoulder and kicked it. This actually dared to attack him in the water. , Who gave him the courage?
If you don't show Xiao Yiheng a little bit of color today, then Brother Li might as well give him his last name!
Unexpectedly, in the face of Li Cheng's kick, Xiao Yiheng did not evade, but directly greeted him, holding Li Cheng's ankle with his big hand, and arrogantly pulling oa towards him.
Shui Liu became alha's most powerful assistant, and Li Cheng (body shen) became lighter, and was actually dragged to Xiao Yiheng.
Li Cheng's eyes rounded in surprise, her lips opened unconsciously, and the tip of her red tongue flashed between the two rows of white teeth.
The next second, Xiao Yiheng (kiss wen) went up.
The four lips intersected, the air in the mouth was taken away, and then sent back lingeringly.
The light and shadow of the underwater are separated, and the clear and mysterious blue (color) surrounds the two teenagers. As the water waves rise and fall again and again, the chaotic light is divided into countless fragments.
Li Cheng stared at Alha, who was close at hand. Between the messy light and blue water waves, Xiao Yiheng's handsome face was a little distorted.
Xiao Yiheng's eyelashes lightly closed, and the water gently brushed his eyebrows. He is no longer a cold iceberg, he has already been melted by Li Orange.
No one knows that in this seemingly calm swimming pool, there is a warm (kiss wen) hiding under the water.
...
Pomelo sitting on the bank with a happy lemon tea straw in his mouth, looked at the two people in the swimming pool suspiciously.
"Brother Xiao, what's wrong with my brother?" she asked ignorantly.
Just now, Brother Xiao was practicing underwater holding his breath. His brother suddenly dived into the water. Then he saw the waves turning and gradually calmed down. Then, the two of them got out of the water at the same time!
Li Cheng flushed and his mouth was ripped. Xiao Yiheng half-supported him and half-armed him, and sent him to rest on a bench by the shore. The golden (colored) hair was wet with water and draped wet on his forehead, making him look like a cat who had just taken a bath.
Youyou wandered around with concern. She took La Xiao Yiheng's hand and asked again, "What's wrong with my brother?"
Li Cheng heard her sister's question, turned around a little embarrassed, and covered her red ears with a towel.
In the end, Xiao Yiheng answered her question.
"I choked water just now." Xiao Yiheng (touching Mo) (touching Mo) said solemnly on her head, "Your brother gave me artificial respiration underwater, so he is very tired now and needs a good rest."
Li Cheng "..."
What a artificial respiration!
I don't know if it was because Xiao Yiheng's expression was too serious. Faced with such a full of errors and omissions, Yuyou was actually fooled. She sat aside obediently, waiting quietly for her brother to rest.
Li Cheng hid his face under the towel, and after a long time, he suppressed the warmth on his face.
Damn, are alha guys who send qg regardless of time and place? He actually attacked him in the swimming pool, making his earlobes hot from his toes.
Because the white t-shirt on Xiao Yiheng's body was completely wetted by the water and almost became transparent because it was launched without the (tuo) t-shirt just now, it was worn on his body as if it were (exposed) and non-(exposed). Vaguely (exposed) the body line, which is more absorbing than all (off tuo) light.
Li Cheng sat on the shore for a while, and found that several people were secretly watching Xiao Yiheng as they passed by. Some people took out their mobile phones and wanted to take a sneak shot. They were scared away by Li Cheng's eyes!
Li Cheng asked muffledly, "Xiao Yiheng, how long will you wear wet clothes?"
Xiao Yiheng was very "obedient", grabbing the collar with both hands, and directly took off the soaked clothes. Before Li Cheng was mentally prepared, alha (强qiang)'s vigorous and thin body broke into his sight.
Unlike Li Chengmi's (color) skin, Xiao Yiheng's skin is much whiter because he stays indoors all the year round, but it is not that thin and thin. He is a standard dressing and looks thin, (take off tuo) clothing (flesh rou), muscle (flesh rou) thinly covering his skeleton, prop up straight shoulders and thin waist.
Li Cheng looked away with some shame, but immediately moved back.
He (强qiang) held his breath, deliberately looked up and down Xiao Yiheng several times with that sort of selective gaze, and finally a few words floated from the corner of his mouth, "...Okay, let's count you reluctantly (qiang) to pass."
"Mian (force qiang)?" Xiao Yiheng raised his eyebrows, "Brother Li thinks I am not good enough, so please advise me."
While talking, he put his hand on his arm, "Is the biceps not developed enough?"
Next, his hand moved to the (chest xiong) mouth again, "is the (chest xiong) muscle not (strong qiang) strong?"
The hand slid down the (chest xiong) mouth again, and finally fell to the waist and abdomen, "still the abdominal muscles..."
"Stop!" Li Cheng immediately jumped up from the bench, covered Pomelo's eyes and scolded him with a blushing face, "There is a little girl here, what are you playing as a gangster?!"
However, the little girl tried her best to break off her brother's hand, looked out of Li Cheng's fingers, and said, "Brother, brother, you let me regain the abdominal muscles of handsome Kangkang."
Li Chengyu asked earnestly, "Youyou, where's the handsome guy with abdominal muscles here, did you drink too much water when you were swimming just now and have hallucinations?"
...
After Li Cheng's persistent teaching all afternoon, Youyou finally learned to swim!
What Li Cheng taught her is the most basic introductory breaststroke. The hands and feet of the pomelo are very clumsy. She can swim 10 meters long enough for Huang Yelun to swim 50 meters.
However, Li Cheng was quite satisfied. When Youyou moved forward in the swimming pool with her own efforts, the big stone in Li Cheng's heart finally let go.
Look, the water is nothing terrible. Look, she can beat it.
As soon as Pomelo learned to swim, she became courageous and took her brother by the hand and said that she wanted to go to the ten-meter slide.
That large slide is the most eye-catching amusement facility in the entire indoor swimming pool. All visitors gather there to enjoy the gratitude of weightlessness (thorn ci) downstream.
"Then... alright." Li Cheng hesitated for a moment, and allowed his sister's little renunciation (sexual xing).
Pomelo was so happy, he hugged the neck of the inflatable flamingo, rushed to the slide, and ran away without a trace.
"Li Cheng, what about me." Xiao Yiheng, who also stayed in the shallow water area, came over and deliberately learned the pomelo tone, "I also want to go to the slide to play."
"You can't." Li Cheng scowled, "You have learned how to swim. You fool hasn't learned yet. That slide is dangerous. You can't swim. If you rush out of the slide, you can plunge into it. What should I do if I can't float in the water?"
"It's not (Guanguan) tied." Xiao Yiheng stretched his hand to the advertising board next to him, "Look, there is a double slide there, so two people can ride together."
Li Cheng looked in the direction of his fingers, and when he saw the photos on the propaganda board, his face blushed.
There are a lot of photos posted on the signboard, two people in groups, all of them are sweet couples. With the assistance of the staff, the young lovers hug each other and lie on the slide, washing down the water.
There is also a beating red heart next to the promotional photo, which says "Enjoy the feeling of rapid weightlessness with your loved one!"
There is just a small problem. The single slide is free, but the double slide is extra. The price is not cheap.
Li Cheng’s little abacus bead hits again, "No, no, I want to find (stabbing ci) excitement, why don’t I (gan gan) practice the double 10-meter platform? Ten meters, double, rapid weightlessness, swimming pool, four The keywords are all there, why should I (gan gan) spend money here to find guilt?"
"..." Xiao Yiheng asked quietly, "Li Cheng, have you only heard of the word'lang'?"
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