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1.宇宙有多大?一般认为宇宙是经历了一次大爆炸后诞生的,随即不断扩展。但是大爆炸发生在什么时候至今是个谜,因而难以确定究竟有多大。2.宇宙是否有秩序?科学的一个假
1. How big is the universe? It is generally believed that the universe was born after experiencing a big bang and then expanded continuously. However, when the big bang took place is a mystery, it is difficult to determine exactly how big it is. 2. Is the universe in order? A science fake