But, for the world’s estimated 340 million blind, visually impaired and otherwise print disabled persons, a hunger for the knowledge contained in books can often go unfed.

但是，对于世界上估计有 3. 4 亿盲人、视力障碍者和其他阅读障碍者来说， 他们往往无法满足对书中所含知识的渴望。