“有一次，阿尔伯特·爱因斯坦亲自向学生授课，学生们都非常兴奋。在这门课程的最后一天，爱因斯坦将考试卷发了下来，顿时教室里一片骚动，学生们议论纷纷。一个学生问：‘老师，这同去年的考卷是一样的啊。’‘啊，是的，’爱因斯坦说。‘但是今年的答案不一样了啊’。” 讲 "On one occasion, Albert Einstein personally gave the students a great deal of excitement, and on the last day of the course Einstein curled his exams, and suddenly there was a riot in the classroom where the students talked about. A student asks, ’Teacher, this is the same as last year’s test.’ ’Ah, yes,’ said Einstein. ’But the answer is different this year.’