In the shelter!

Han Xuening and Lin Qingxue are preparing a few bamboo tubes!

The bamboo in the bamboo forest grows very luxuriantly, thanks to the subtropical rainforest climate.

The thickest part of the bamboo is at the very bottom, and the thick bamboo knots here are about the size of the mouth of a bowl.

Its inner diameter can fully accommodate a mineral water bottle, but the height of a single bamboo section cannot accommodate a mineral water bottle, after all, the height of a bottle is completely more than 20 cm.

"Teacher Han, if we cut off a single bamboo joint, we will definitely not be able to hold a mineral water bottle. Lin Qingxue was gesturing with a bottle of mineral water filled with fresh water.

Put the mineral water on the bamboo lying on the ground and measure, and found that the mineral water is significantly higher than the bamboo 5 fingers long!

"That's it!" Han Xue Ning looked at the bamboo on the ground for a while, "Let's just cut off the two thickest bamboos, and then dig through the internal barrier of the bamboo link with a machete." ”

"That's ...... It should be possible!" Lin Qingxue blinked her big eyes and thought for a while, thinking that it was feasible!

After that, the two girls were making the thickest bamboo tubes, and in a few minutes they made two bamboo tubes that could fully hold a mineral water bottle.

And at this time, Li Zijun also came back!

"How's the refrigerator doing?" Lin Qingxue was holding the bamboo tube she made and showing it to Qin Fengyi.

"The refrigerator is finished, but the mud is still a little damp, but this does not affect the use of the refrigerator. Qin Fengyi explained, "If you put dozens of bottles of frozen water in a humid refrigerator, the sub-zero freezing temperature will completely freeze the moist soil, which can have the effect of keeping warm, and it is also very strong." ”

"Well, just like in the Romance of the Three Kingdoms, the fortress that lacks defense in the winter war is mixed with sand and water, and the ice condensation is used to accumulate to create a sand city wall. Han Xue thought for a while, nodded and said.

"Yes, that's probably the principle!" Looking at the fair-skinned, beautiful and charming beautiful teacher, Qin Fengyi was a little uneasy, but it was a pity that Teacher Han came to the eldest aunt, so let her be spared for the time being, as for Lin Qingxue, she can be tossed at will.

"Damn!" Lin Qingxue was thinking about the problem, but after glancing at Li Zijun, she suddenly became calm, "Can you not look at me with such disgusting eyes, I'm scared ......"

"What are you afraid of, can I still eat you?" Qin Fengyi rolled his eyes helplessly, Xiao Nizi has become very timid since she was snapped by herself.

She used to like to quarrel with Qin Fengyi the most, but now as long as the big animal has a tougher attitude, Lin Qingxue will be intimidated in seconds.

"I'm afraid you'll eat my ......," Lin Qingxue muttered in a low voice.

"Okay, let's hurry up and make ice!" Han Xuening said, "Qin Fengyi, do you have any good ideas?"

"If it's a good way......" Qin Fengyi thought carefully and frowned, "I don't know how effective the liquid nitrogen ice is, but this thing can evaporate quickly, right?"

"Yes, after all, the temperature is too low, hundreds of degrees below zero, and it is said that if you put a fish in liquid nitrogen, it will be frozen into an ice sculpture in just a few seconds, and it will be alive after thawing, which is really amazing. Lin Qingxue likes to watch some bizarre videos, and she has also watched a lot of videos of liquid nitrogen.

The group was ready to start making ice, and most of the bottles in the shelter needed to be filled with fresh water, a few bottles of liquid nitrogen, and two bamboo tubes.

"Goo...... Gollum ......"

Lin Qingxue and Han Xuening are pouring relatively clear river water by the river, and there are about dozens of bottles with caps, which can be used to make ice bottles after these flats are sealed.

"Roar ......"

Yayale is soaking in water in the river downstream, and the wild boar crocodile is a creature that can live on land as well as in the water, and it is washing and protecting the two hostesses.

Desert islands are becoming more and more unusual, and too many strange creatures are gradually coming to the surface.

"Teacher Han......" Lin Qingxue looked at Qin Fengyi who was working with a worried expression, "I'm really worried now, I don't know what Qin Fengyi saw on that weird building." ”

"Is that an inverted triangle?" Han Xuening was gently caressing Scarface's neck with one hand, and the hair on this guy's neck was like a steel brush, very rough.

"Woo woo......" After the honey badger heard the inverted triangle, his expression became very nervous, this guy had followed Qin Fengyi to that rather terrifying place.

"Hey!" Lin Qingxue sighed heavily, lowered her eyes, and was gently teasing the flat-headed brother's chin with her slender and slender fingers, she whispered, "That guy...... He carries everything by himself, and when he encounters something, he will always hide it. ”

"Probably...... This is a habit of Qin Fengyi to protect us!" Han Xuening drew circles on the ground with small branches, "After making the ice, I think I have to have a good exchange with Qin Fengyi." ”

"Hmm!" Lin Qingxue nodded noncommittally, "He carries everything by himself like this, it's too tiring." ”

"Maybe I found something terrible......" Han Xue squinted, recalling Qin Fengyi's expression at that time.

All of them came to the underground chamber and walked down the stairs, and they could clearly feel that there were two different temperature dividing lines.

It is warm above the waist and cold below the waist, with a temperature difference of at least 6-10 degrees.

"It's so strange here!" Lin Qingxue blinked, crouched down and stroked her somewhat cold ankles with her small hands, "The cool in the low places is the principle of cold air descending, right?"

"That's right, the terrain resembles a cave, and it's well sealed, which is good for ice preservation. Qin Fengyi came to the refrigerator and looked at the refrigerator he had worked so hard to make, and its interior was full of woven straw mats and the like, which could play a role in keeping warm.

"The fridge looks good, but I don't know how well it keeps warm. "Han Xuening admires Qin Fengyi very much, this guy's hands-on ability is very strong.

"Actually, we can add a few more layers of protection to the outside of the refrigerator, so that it can also keep warm. Lin Qingxue remembered the bamboo cage made by Qin Fengyi, "You can use bamboo to make a protective cover, which is similar to bamboo, and then cover the outer circle with leaves, so as not to let him breathe." ”

"The idea is quite good!" Qin Fengyi thought for a moment, "The method is feasible, I'll make a cover later, but for now we have to see if liquid nitrogen can be used." ”

Liquid nitrogen is probably in an aluminum bottle, and it is not known whether this thing has evaporated, after all, liquid nitrogen will evaporate in a short time when it encounters air.

If the liquid nitrogen is gone, then you can only use saltpeter powder to make ice cubes, but the efficiency of this thing is definitely not as good as the liquid nitrogen of minus hundreds of degrees, after all, saltpeter powder only absorbs the heat in the water when it encounters water, and the water temperature is about to freeze.

Slowly open the bottle of liquid nitrogen with a knife!

I'm back, my mentality is good, this book will not be a eunuch, it will always be serialized, I'm sorry, my dear readers, the irresponsible author interrupted for 15 days......

Not in the future

(End of chapter)