在中国古籍中最早使用宇宙这个词的是《庄子·齐物论》。“字”的含义包括各个方面,如东西南北的一切地点。“宙”包括过去、现在、白天、黑夜,即一切不同的具体时间。古人云,上下四方为之字,古往今来为之宙(详见《淮南子·原道训》),按照物理学的观点,上下四方是空间,也就是一个三维的概念,而古往今来是时间,是一个一维的概念,宇宙两个字联系起来就是时间和空间的统一。后来,“宇宙”一词便被用来指整个客观存在的世界。 The earliest use of the word universe in Chinese ancient books is “Chuang-tzu · Qiwu theory.” “Word ” includes all aspects of meaning, such as all places in North East. “Universe ” includes the past, present, day, night, that is, all the different specific time. According to the viewpoints of physics, the upper and lower quarters are spaces, that is, a three-dimensional concept, and the past and present are the time, that is, from the past to the present, to the universe (see “Huainanzi · Original Taoism” A one-dimensional concept, the universe is linked to the word two is the unity of time and space. Later, the term “cosmos” was used to refer to the entire objective world.