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世界纪录在本届奥运会上犹如屏风，一捅就破。开赛第一天就刷新了９项世界纪录，第二天破了４项，第三天和第四天，又有多项世界纪录被打破。这种破世界纪录的强劲势头为历届奥运会所罕见。在运动成绩越来越接近极限，兴奋剂检测越来越严格的今天，打破世界纪录已不是一件易事。９０年代中期，随着国际体坛反兴奋剂的力度明显加大，各项目破纪录曾一度减少。本届奥运会经过严格药检，但运动员们仍在一开赛就掀起了破纪录的狂潮，原因何在？
World record in the current Olympic Games like a screen, a poke on the break. On the first day of the race, nine world records were refreshed, four were broken the next day, and a number of world records were broken on the third and fourth days. The strong momentum of this world record breaking is rare in previous Olympic Games. It is no easy task to break the world record today when athletic performance is getting closer to the limit and doping tests become more stringent. In the mid-1990s, as the strength of the international sports anti-doping campaign increased significantly, record breaking of the projects was once reduced. The Olympic Games after a rigorous drug test, but the athletes are still in the opening race set off a record-breaking frenzy, the reason?