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20世纪是人类史上的一个辉煌的世纪。这百年中的发展与变化,足以让人类骄傲与自豪。特别是这百年的科学技术成果,几乎改写了人类的历史,改变了世
The 20th century is a glorious century in human history. This century of development and change is enough to make human beings proud and proud. In particular, these 100 years of scientific and technological achievements have almost rewritten the history of mankind and changed the world