"Sister Acai, I told my sister, and she will help you watch Chen Bin later." Chen Cailing said to Ah Cai, after the two came out of the camp, they were outside and prepared to take the car back.

"Huh? Why are you looking at him? Ah Cai was stunned, not quite understanding what Chen Cailing meant.

"Aren't you worried about that Guo Lingling?" Chen Cailing asked, the last time the two sent them to the camp, she had been helping Ah Cai worry about this matter, and it was rare to have the opportunity to come over to meet Chen Ting this time, so she quickly asked Chen Ting to pay more attention to the relationship between Chen Bin and Guo Lingling in the camp.

"It's false to say that you're not worried, but it doesn't seem necessary to worry," Ah Cai thought for a while and said, "The foundation of love is trust." ”

"In fact, we are not worried about Chen Bin, we are afraid that Guo Lingling is very active, but I inquired with my sister, and that Guo Lingling didn't seem to stick to Chen Bin much, and there was very little intersection between the two."

"Really?" Ah Cai smiled, and the mood that was still a little lost suddenly relaxed a lot.

"It will take a long time for them to come back from this training and then to the polar regions, so I really wish I could go with them," Ah Cai said, "Sometimes I feel like it was better when I lived in the detention center." ”

"No, sometimes I really want to go back." Chen Cailing nodded.

"But there's no future there," Ah Cai sighed, "There is no such thing as a double dharma in the world. ”

By the time the two girls got into the bus back, the camp was about to begin.

The person who came to explain the theoretical knowledge to the people in the camp was indeed Professor Xia Yunli, Chen Bin and Da Fei were already familiar with this polar research expert, but most of the others were dealing with him for the first time.

"Polar science encompasses a wide range of disciplines, including snow and ice, geology, geophysics, marine hydrology, meteorology, chemistry, biology and the environment." Xia Yunli told the students, "The land in the Arctic Circle is frozen almost all year round, and there are only two seasons in a year: a long winter and a short summer. In the middle of winter, sometimes the whole day is dark, which is what we call the polar night, and in the summer, it is 24 hours a day. ”

"In addition to glaciers and frozen seas, in the Arctic the temperature can reach more than zero or even about 10 degrees in summer, and in winter it can drop to more than minus 50 degrees, and in Eastern Siberia, there have been low temperatures of minus 69 degrees."

"There are hurricanes in the polar regions in the autumn and winter, which can lift the snow up to 30 meters, and we will look like a blizzard, but it is not snowing. At low temperatures, strong winds have a noticeable condensing effect. What is the condensation effect? Let me explain to you, for example, when the wind speed is more than 10 degrees below zero, if the wind speed is 32 kilometers per hour, the temperature will be equivalent to more than minus 30 degrees, and if the wind speed reaches 64 kilometers per hour, it will be equivalent to a severe cold of more than minus 40 degrees. The lower the temperature, the more pronounced the actual drop will be. ”

"At the beginning of the training course, I was telling you that going to the poles is a dangerous thing to do, especially since you will be living there for months. Maybe some people thought that going there was more like a tour, and if anyone thought so, I would say that you are wrong. ”

"When a snowstorm comes, migration is the most irrational option, and it is also very difficult to find directions in the vast areas of ice and tundra. The ice melts in the summer, causing many swamps to appear in the tundra area, and the ice in the sea becomes semi-melted, which is dangerous. ”

"There are also flies in the polar regions, especially in summer, black flies, deer flies and water flies can be very disgusting, and their larvae live in the water, so when you go out, whether you set up a tent or take a break, you have to avoid being too close to the water's edge."

"There are many mountain ranges in Alaska, Greenland, Iceland, Spitsbergen and other islands, where iceberg cliffs, ice cracks and frequent avalanches can be very dangerous for us. And for a few months each year, there is a thick fog along the coastline of the Arctic Ocean, sometimes extending inland, making it more difficult to discern the direction. ”

"Once we are in the polar regions, we can't rely on the compass. When you go out, you can use the constellation to confirm your position at night, and you can use the "Shadow Discrimination Method" during the day, which I will explain later. ”

"The city of Longyearbyen is located in the Isfjord, near the sea, and if we are faced with going in a sea of ice, we must be careful not to walk on the ice floes or away from the land markers, because this will cause us to lose our way, and the large ice floes will often drift, and the position will change, and the ice floes will break. If we are forced to cross the ice floe, we should jump quickly and land at least 60 centimeters from the edge of the ice floe. Maybe we've seen this in the movies, where there are survivors who are rescued from drifting ice floe, but under normal circumstances, the ice gradually melts as it drifts towards a warmer sea, and you can imagine the real result. ”

"We want to avoid ice floes as much as possible, most of them are below the surface of the water, and if the ice floes start to melt, or if we're standing on them, they can flip over without warning, especially if we add weight to the top of it when we stand on it."

"Ice cliffs are also a dangerous area, because icebergs can suddenly dissociate into huge chunks of ice, often weighing thousands of tons, that suddenly break into the sea."

After Xia Yunli explained the environment in the polar regions, he began to introduce the clothes suitable for wearing in the polar regions.

"The polar regions are cold, and the cold and gale can freeze the exposed flesh of a human being in a matter of minutes. We need to protect our entire body, hands and feet, and wear a hood to protect our face. Here I would recommend hoods with fur trims, as they prevent the moisture carried out by the breath from condensing on the face and prevent frostbite on the skin. ”

"The coat should be windproof, and the fabric should be as much as possible to prevent snow flakes from sticking to it. We can't use waterproof materials, because it is not easy for water vapor to dissipate and condense in the clothes, and leather outerwear is ideal. ”

"Danger in the bitter cold!" When the knowledge he told involved this aspect, Xia Yunli's tone also aggravated a lot.

"The first is hypothermia, which is when the amount of heat produced inside the body is less than the amount of heat emitted by the body, causing the body temperature to drop below normal values. This can be caused by fatigue, underdressing, inadequate food intake, and lack of knowledge and preparation for low temperatures. ”

"Although hypothermia can occur in any cold environment, the places that tend to cause hypothermia are mostly located in the polar regions where we are about to go. Under the invasion of violent cold snaps, this is almost a common disease, especially for those who are in poor health. ”

"I'll talk about the signs and symptoms of hypothermia: first the behavior becomes irritable, and after a while, then drowsiness, the reaction begins to become sluggish, and there are some problems that cannot be coped, and there may be uncontrollable tremors and uncoordinated movements. In severe cases, headaches, blurred vision, abdominal pain, and even coma may result in unconsciousness. ”

"What should we do in this situation? First of all, we need to prevent further heat from our body and take shelter indoors. Do not allow the sick person to lie on the ground, but take warm measures, such as warming the sick person with warm objects. While the person is awake, let the person drink hot beverages and eat sugary foods. ”

"When hypothermia worsens, the body is unable to heat itself again, so it must be heated from the body. If rapid heating is carried out outside the body, it will promote the flow of cold blood into the body, which will further aggravate the condition. We can place the body in these parts of the patient's body: the lower back, stomach sockets, armpits, back of the neck, wrists, crotch, where the blood flow is close to the surface of the body and can carry heat into the body. ”

Xia Yunli said as he pointed out the corresponding position on his body with his hand, and then emphasized, "Don't take alcohol, some people may think that drinking alcohol in cold weather can make the body heat up faster, but in this case, alcohol will only open the blood vessels on the surface of the body, and the heat in the body will be lost faster." ”

"There is also frostbite, frostbite is also divided into preliminary frostbite, deep frostbite and severe frostbite, and I will also talk about this part of the knowledge later. What I'm going to talk about here is the symptom of 'snow blindness', which is a form of temporary loss of vision, which is caused by the intensity and concentration of the sun's rays, in fact, it is usually reflected by the snow and ice on the ground or the ice crystals on the clouds, and normal people will not always stare at the sun. “

"After we arrived in the polar regions, we should try to wear eye patches to prevent our eyes from being exposed, and if we have symptoms of blindness, we can change to a dark place and use a cold damp cloth to relieve the pain in our forehead, and a good environment can cure snow blindness in time."

"That's all for today's polar science, the next course is polar survival skills, although we will stay in the camp most of the time after we go to Spitsbergen, we may also need to go outside to do some activities, so it is necessary to understand and master some survival skills." Xia Yunli stood on the stage, he saw a few familiar faces among the people below, he smiled at Chen Bin and Da Fei, and continued, "Starting tomorrow, there will be special people in the camp to conduct targeted physical training for everyone, I hope everyone will actively participate in it, so that the body can be further exercised before going to the polar regions." ”

"Professor Xia is a professional," the class just now made Da Fei sigh from the bottom of his heart, "Although we have already been to Spitsbergen once, we almost don't understand the knowledge he talked about just now." ”

"It's better to travel thousands of miles than to read thousands of books, and this journey of thousands of miles must be led by someone who is familiar with the road." Chen Bin also nodded and agreed.