详细解释:n. 角贴书, 入门书
英语解释：
名词 hornbook:
a primer that provides instruction in the rudiments or basic skills of a branch of knowledge详细解释：
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