doctorial

例句：

1. 1. The textbook is very informative and educational.
   这本教科书非常信息丰富且富有教育意义。
2. 2. He has a doctorial approach to teaching.
   他在教学上有一种指导性的方法。
3. 3. This document is highly doctorial and should be read carefully.
   这份文件非常有教学价值，应该仔细阅读。