20世纪80年代末，当它作为一种纯文本媒介出现时，它被视为一种追求知识而非快乐的工具。
When it emerged towards the end of the 1980s as a purely text-based medium, it was seen as a tool to pursue knowledge, not pleasure.
新闻摄影是传播信息和知识的媒介。
News' photographing is the medium which spreads information and knowledge.
增加传染病传播的媒介、动物宿主以及模式和动态的知识。
To increase knowledge of vectors, animal reservoirs and the modes and dynamics of transmission of communicable diseases.
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