摘要
一位老师对所讲课文总是非常投入，从不抬头。他常让一个学生来翻译和解释，并且——不自觉地——他常日复一日地叫同一个学生。出于尊敬，学生并不给他指出这一点。
A teacher was always so revolved （沉浸于） in the text being studied that he never looked up. He would call on a student for translation and explanation, and-without realizing it-he often chose the same student day after day.
