依万·费奥多西维奇的姓我已经想不起来了。 当班里吵吵嚷嚷,发生激烈争论时,他从来也不制止。我们还可以到黑板前去,把自己的证明方法写在黑板上,他或是点头,或是摇头。如果有人打哈欠,无精打彩,他也不说什么,只是用细长的手指头指一下门,打哈欠的人就明白了,这是让他去楼道透透风。学生出去之后,随时都可以再回数室。 I can not recall the last name of Ivan Fyodosic. When the class noisy, in the fierce argument, he never stopped. We can also go to the blackboard, write our own proof of the method on the blackboard, he nodded, or shook his head. If anyone yawns, listlessly, and he does not say anything, he refers to the door with his slender fingers. The yawning people understand that this is a way for him to go to the corridor to see through the wind. Students can go back and forth at any time after they go out.