改进题：By the first century the making of paper in some parts of China had been well developed and had been common.
译文：在公元一世纪时，中国一些地方的造纸业得到了好的发达进而普遍。
改进的译文：到公元一世纪时，中国一些地方的造纸业已很发达而且很普遍。
改进题：By the first century the making of paper in some parts of China had been well developed and had been common.
译文：在公元一世纪时，中国一些地方的造纸业得到了好的发达进而普遍。
改进的译文：到公元一世纪时，中国一些地方的造纸业已很发达而且很普遍。
