2011年4月,当清华大学百年校庆之际,清华历史系邀请1952年院系调整前曾在本系学习过的老校友返校聚会。当天到会的共有20多人。其中最年长的是1939年在西南联大入学的何兆武先生,现已年届九旬。最年轻的则是1951年入学的王敦书先生,也已78岁。聚会中的话题之一是半 In April 2011, when Tsinghua University celebrated its centenary, the Tsinghua History Department invited the former alumni who had studied in the department prior to the 1952 faculty adjustment to go back to school. A total of more than 20 people will arrive on the same day. One of the oldest is He Zhaowu, who joined the Southwest Associated University in 1939 and is now ninety years old. The youngest is Mr. Wang Dunshu, who entered school in 1951 and is 78 years old. One of the topics in the party is half