求翻译：2、12世纪至15世纪初，字体分数较低。当时字体多用于手抄书，手抄员为了快速书写而形成的字体。并且，当时的书写媒介多为羊皮纸，正是这种媒介增加了书稿上的彩绘艺术，字体的连贯性与艺术性增强。受技术和设计水平的限制，从而降低了字体的识别性。是什么意思？

2,12 century to the early 15th century font with lower scores. At that time, the font used for hand-written books, handwritten members of the font to rapid writing. And writing media, and more parchment, it is the medium on the manuscript painting art font coherence and artistic enhancement. Subject

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2, 12th century to the early 15th century, the font lower scores. Font was used for manual book manual for rapid writing and formation of the font. And when writing medium of parchment, manuscript painting art on was it is this increased media, font consistency and artistic enhancement. Limited by t