模仿文本：This weekend marks 50 years since the assassination of the US President John F Kennedy. The man accused of killing him, Lee Harvey Oswald had spent two and a half mysterious years in the Soviet Union before the shooting. David Stern has been to Belarus to talk to two people who were students in Minsk in the 1960s and who got to know Oswald there.

 

译文：本周是美国总统约翰·F·肯尼迪遇刺50周年。被控谋杀他的人李·哈维·奥斯瓦尔德在对总统开枪前，曾在苏联渡过两年半神秘的生活。大卫·斯特恩前往白俄罗斯，采访了两位60年代在明斯克求学期间认识奥斯瓦尔德的人。