1·Because learning recently do not know this book is the schoolbook of the university necessary buy.
因为最近正在学习，不知道这本书是不是大学的教科书，有没有必要买。
2·As a new subjcct there has been no teaching syllabus and schoolbook there are many focuses of debate in labor analgesia.
摘要分娩镇痛是一门新兴学科，尚无现成的教学大纲和教科书，也有许多争义的焦点。
3·The demand curve of schoolbook is two, is not.
教科书的需求曲线是两条，而不是一条。
4·Because learning recently, do not know this book is the schoolbook of the university, necessary buy.
因为最近正在学习，不知道这本书是不是大学的教科书，有没有必要买。
5·She took it as a schoolbook which she used to learn the rules of pronunciation.
她先把词典当作教科书，利用它来学习读音规则。