horn.book
n.(名词)An early primer consisting of a single page protected by a transparent sheet of horn, formerly used in teaching children to read.角帖书:一种早期初级读物,即为一张盖有透明角片作为保护的书页,以前供儿童认字用A text that instructs in the basic skills or rudiments of a subject.初级读物:教授某一学科的基本技巧或知识的读物