城市化是一个社会不断进步的过程。
在现代科学和理性精神主导下，人类社会不断进步；
Under the guidance of modern science and rational spirit, the human society makes continuous progress.
书籍是人类文明的标志之一，是社会不断进步的阶梯。
Books are a hallmark of human civilization and a ladder for continuous progress of society.
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