cross-country skiers , marathon race. 越野滑雪， 馬拉松比賽。

Arnd Wiegmann / Reuters
PhotoBlog - More than 11,000 cross-country skiers participate in marathon race
http://photoblog.msnbc.msn.com/_news/2012/03/11/10641932-more-than-11000-cross-country-skiers-participate-in-marathon-race