研究最早简单印刷品是研究印刷术起源的第一步。
Researching on original simple printed matter is the first step of studying printing origin.
报纸读者如此迅速老化的原因很简单：年轻人比其它人更快抛弃印刷品。
The reason why newspaper readers are ageing soquickly is simple: the young are abandoning print faster than everyone else.
培训材料：培训指南或者手册、简单笔记或印刷品、插图海报或小册子；
Training material : trainers’ guides or manuals, simple notes or handouts, illustrated posters or booklets;
培训材料：培训指南或者手册、简单笔记或印刷品、插图海报或小册子；
Training material : trainers’ guides or manuals, simple notes or handouts, illustrated posters or booklets;
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