Whatmakes15,000menandwomenrunforhours,andwhatmakesthemr...
问题详情：Whatmakes15,000menandwomenrunforhours,andwhatmakesthemrunthroughthestreetsonacolddaywithoutcoats?Iwasoneofthoserunners.Theraceiscalledmarathon(马拉松).Ihadneverrunmorethaneightmilesbefore,andh...