中文摘要：

郑建宣、陆学善、余瑞璜三位物理学家曾于1934-1936年间留学英国曼彻斯特大学．3人在英国著名物理学家劳伦斯·布拉格的指导下，从事X射线晶体学研究，并都取得了重要成果．这一时期的留学科学研究对这3位物理学家日后的科研发展产生了重要的积极的影响．3入学成归国后继续从事晶体学的研究，推动了晶体学在中国的建立与发展．

英文摘要：

C. S. Cheng, S. S. Lu and S. H. Yti were Chinese physicists, who all studied in UK from 1934 to 1936 at University of Manchester. Under the guidance of famous British physicist William Lawrence Bragg, the three students engaged in the research of X-ray crystallography. They made important achievements during their abroad. The academic achievements had a significant positive impact on their later research. They promoted the research about crystallography of China after they returned.