一、项目的来源: 马拉松賽跑是田径运动中一个超长距离的公路竞賽项目。全程为42公里195米。它是田径项目中不设世界记录,只公布最高成绩的项目。是近代奥运会每届都必定举行的主要项目。比賽时,起终点可设在田径场内,而绝大部分跑程是在公路上进行,一般采用一个转折点的路线或环行路线,沿途有里程碑、饮料站和路径方向等明显的标帜 First, the source of the project: Marathon race track and field is an ultra-long distance road race. The entire process is 42 kilometers and 195 meters. It is track and field project without a world record, only announced the highest score of the project. It is a major project to be held in every modern Olympic Games. During the competition, the starting and ending points can be set at the track and field venue, while the vast majority of the journeys are carried out on the roads. Generally, a turning point or a circular route is used along the way with obvious flags such as milestones, beverage stations and path directions