求翻译：3、17——18世纪，字体识别性上升。这个时期社会收入水平飞快提高，其中收入稳定的中产阶级的文化教育水平提高大大刺激了社会生产的需求，大量产品需要被重新设计和包装，极大地刺激了平面设计的发展。18世纪法国大革命和启蒙运动以后，政治气候的变化直接带来了艺术风格的转变——封建统治陷入落寞使充满皇室气息的洛可可风格逐渐消失匿迹，转而代替的是大革命理性和谨慎的风格。新兴资产阶级提倡希腊古典艺术和文艺复兴艺术，产生了古典主义的艺术风格。工整笔直的线条代替了圆弧形的字脚。技术上，点状笔的发展也带来了新一轮的设计革新。是什么意思？

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3, 17 - 18th century, the font, rise. This period of rapid social income levels, income stability of the middle class, the cultural level of education increased significantly stimulated the production of social needs, and a lot of products need to be re-design and packaging, greatly stimulated the d

3, 17--18 century, font identification increases. Social income levels during the fast improving, stable middle class income levels of culture and education has greatly stimulated the production needs of the community, a large number of products needs to be redesigned and packaged, which greatly sti