南极洲,又称第七大陆,是地球上最后一个被发现、人类社会至今对其知之甚少的大陆,也是地球上唯一没有土著人居住的大陆。由于海拔高,空气稀薄,再加上冰雪表面对太阳能量的反射等,使得南极大陆成为世界上最为寒冷的地区。南极大陆的年平均气温为零下25度,经 Antarctica, also known as the Seventh Continent, is the last continent to be discovered on Earth, which humankind has so far little known about, and the only continent on Earth without any indigenous people. Due to the high altitude and thin air, coupled with the reflection of the solar energy on the ice and snow surfaces, the Antarctic continent has become the coldest area in the world. The annual average temperature in Antarctica is minus 25 degrees