目前世界赛跑好手水平非常接近,不仅短跑项目需用精确到百分之一秒的电子计时仪器才能定出输赢,就是在中距离、长距离,甚至超长距离的马拉松赛跑中也都出现了人工计时难分胜负的现象。今年一月中旬,第十二届休斯教马拉松赛跑在美 At present, the number of racers in the world is very close. Not only is the sprint project accurate and accurate to one hundredth of a second, the electronic timing device can determine the win or lose, that is, the artificial marathon also occurs in middle distance, long distance and even ultra long distance marathon Timing is difficult to determine the outcome of the phenomenon. In mid-January of this year, the Twelfth Hughes Marathon race in the United States