人们常用“不知天高地厚”来讥讽那些知识浅薄而又夸夸其谈的人。但随着科学技术日新月异的发展,人类基本上实现了天高可问、地厚可测的愿望。“天”可以理解为包裹在地球外围的一层空气,它位于地面和星际空间之间,如同地球的“外衣”,随地球一起运动变化。按温度分布的特点,科学家把大气分为5层:对流层、平流层、中间层、热层 People often use “unimaginable” to ridicule those shallow and boastful people. However, with the rapid development of science and technology, humankind has basically realized the aspirations of being astronomical as possible and as thick as measurable. “Heaven” can be understood as a layer of air wrapped around the periphery of the earth. It lies between the ground and the interstellar space. Like the “outer coat” of the earth, it moves with the earth. According to the characteristics of temperature distribution, scientists divide the atmosphere into five layers: the troposphere, the stratosphere, the middle layer, the thermal layer