那天,几个人聊起中学里的研究型课程。我问:如果有学生要研究永动机,我们教师对此是持肯定态度还是持否定态度?几位众口一词地说应持否定态度。后来我想,是的,以今天的认识水平看,永动机之不可能,就像一加二不可能等于四一样。但人类对永动机的研究和探索,是经历了一个相当长的历 On that day, a few people chatted about research classes in high school. I asked: If there are students who want to study the perpetual motion machine, do our teachers hold a positive attitude or a negative attitude? Several people should say that they should hold a negative attitude. Later, I think, yes, with today’s level of understanding, perpetual motion is impossible, just as one and two can not equal four. However, human research and exploration of perpetual motion machines have undergone a rather long history