The invention of printing was a milestone in human progress.
印刷术的发明是人类进展的一个里程碑。
The invention of printing was a milestone in human progress.
印刷术的发明是人类进步的一个里程碑。
The invention of printing was a mile-stone in human progress.
印刷术的发明是人类进步的一个里程碑。
The invention of printing was a mile-stone in human progress.
印刷术的发明是人类进步的一个里程碑。
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