指定教科书 meaning in English

prescribed book
prescribed text

While there is no assigned textbook for the course , three textbooks are listed for further study
如果这门课没有指定教科书，那么以下列出的三本教科书可供学生深入学习。
Some teachers don ' t designate any specific textbooks but rather list many reference books . it ' ll cost us a small fortune if we have to buy them all
有一些老师没有指定教科书，可是列了好多参考书目。买起来可要花不少钱！
B ： some teachers don ' t designate any specific textbooks but rather list many reference books . it ' ll cost us a small fortune if we have to buy them all
有一些老师没有指定教科书，可是列了好多参考书目。买起来可要花不少钱！