本文部分内容,曾在1985年的《中国科技史料》中发表过。张锡钧老人读过该文后,曾对我们说;这是他最满意的记叙他求学和科研生涯的文章。当时他的身体已不太好了,但仍然心情很好地讲了许多文中没有写出的往事。这些往事体现出了中国20年代的优秀科学家在学习西方一流科学技术过程中所付出的艰巨努力和代价。 今天,中国又重新出现向西方学习先进科学技术的高潮。通过对20年代情况的重新回忆,或许有助于我们得到更深刻的认识。本课题曾得到国家自然科学基金会资助。 Part of this article was published in the 1985 China Science and Technology History. After reading this article, Zhang Xijun, an old man, once told us that this is his most satisfying article about his studies and career in science. At that time, he was in poor health, but he was still in a good mood to talk about many things that were not written in the text. These events reflect the arduous efforts and costs paid by excellent scientists of the 1920s in their study of the first-class Western science and technology. Today, China has again emerged as the climax of learning advanced science and technology from the West. Through the recollection of the situation of the 1920s, we may be able to get a deeper understanding of us. This topic has been funded by the National Natural Science Foundation.