长难句：Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries.
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n结构剖析：本句的主干是 Comparisons were drawn between ... and ..., 难点在于使用了被动语态，理解时可以转换成主动语态： People drew comparisons between ... and ... （人们对.... 与.... 进行了一些比较）。
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n核心词汇： comparison 比较
ndiffusion 传播；扩散
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n参考译文：人们对20世纪电视业的发展与15、16世纪印刷术的传播进行了一些比较。