Ví dụ công khai
In winter the thermometer on the Mongolian plateau sometimes drops to –40° Fahrenheit, yet the camels wander about with no sense of suffering. On the other hand, the Russian explorer, Prejevalski, found the temperature of the ground in the Gobi Desert in summer to be more than 140° Fahrenheit, and the camels are apparently as indifferent to this degree of heat as they are to the winter cold.