张宏凯,一个中等个头、精干聪慧的初一男生,脸庞不大,眼睛很有神。他喜欢微微地笑,带着一丝腼腆地跟人说话。他看着我,目光明亮而清澈,声音不大,带有一些犹豫地问:“白老师,你讲的这一道题目好像错了,我的看法对吗?”我笑了,真是一个纯朴、认真、执著的学生。教学相长,我们认识 Zhang Hongkai, a medium-sized, clever first-year boys, face is not large, eyes very God. He likes to laugh a little and talk to people with a shyness. He looked at me, his eyes bright and clear, his voice was low, and he asked with some hesitation: “Teacher Bai, you seem to be wrong on this topic, is my opinion correct?” I laughed and it was a simple, Serious, persistent student. Teaching, we know