“摩天大楼”是人们对很高的楼房的泛指。由于建筑能达到的高度受到建筑技术和材料的制约，以及思想观念的左右，不同时代的人对“摩天大楼”高度或层次的界定是不一样的，如同今天人们对“高层”建筑的界定是一个不明确的概念一样。 　　汉字中的“摩”原义为摩擦、抚摸，是指 “Skyscrapers” is a general reference to people in very tall buildings. Because the height that the building can reach is restricted by the building technology and materials and the ideas and concepts, people of different ages define the height or level of “skyscraper” differently. Just as the definition of “high-rise” building today is An ambiguous concept. The original meaning of “friction” in Chinese characters is rubbing, stroking