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Here are some instructions for you, 
if it so happens that you are in the jungle: 
First of all, you should use mosquito repellent cream;  
Second, you should find a place, where you are going to stay.
Third, you should make а tent and a bed.
Then, you must look for some animal to kill or for some other edible things. 
After that you must make a fire for cooking food, keeping yourself warm and for keeping the wild animals away.
Note: to find water you should look for animals' paths and follow them: 
wild animal paths usually lead to some water sources.

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The inventive method makes it possible to reduce the time of recovering of people working in extreme conditions.

A number of species can survive and even flourish in extreme conditions.

The radio is designed to operate in extreme conditions.He conducted extensive research on the physiological changes in animals and humans in extreme conditions.Temporary typists have also had to work at times in extreme conditions, such as the corridors or in shifts.Owing to the wide variety of extreme environments, deep-sea ecosystems provide examples of molecular adaptation to extreme conditions, all of which may help understand the selective processes that allow evolution and persistence of life forms in extreme conditions.The inequality and plurality which are reflected in extreme conditions among the indigenous peoples are considered to be unresolved key national problems that will have an impact on the definition of the model of national development in the economic and political spheres.