Although there are many skillful Braille readers, thousands of other blind people find it difficult to learn that system.
虽然现在有许多熟练的盲文读者，但还有成千上万的盲人认为学习盲文系统很困难。
1809 - Louis Braille, inventor of a reading system for the blind, was born in France.
1809年的今天，盲文系统的发明者路易·布莱尔在法国出生。
Braille worked out a system of marks for mathematics and music.
布莱叶还为数学和音乐研制了一种符号系统。
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