一九三九年,我在成都中央大学医学院读书,童弟周老师教我们胚胎学。课程结束以前讲了一段实验胚胎学,亦介绍了发育的因果关系,胚胎各部分之间的相互影响以及遗传、进化等问题。童老师的讲话使我们对胚胎学知识的眼界豁然扩大,从死背硬记转向思考问题。同学们议论说,听了这堂课以后,好像变得聪明了,但是此时我们并不了解他就是这方面的专家。从此我们 In 1939, I was a student at Chengdu Central University School of Medicine, and Tong Di Zhou taught us about embryology. Before the course ended, we talked about experimental embryology. We also introduced the causal relationship between development, the interaction between various parts of the embryo, and the genetic and evolutionary issues. The speech of Tong teacher made us suddenly expand the horizons of embryology knowledge, from hard-core to thinking. The students argued that after listening to this lecture, it seemed that they had become clever, but at this moment we did not understand that he was an expert in this field. From now on we