The intense training that Tour de France athletes undergo to race in a three-week-long competition cycling up and down mountains is arguably among the toughest in professional sports.
环法运动员必须在三周内攀山越岭完成赛程，无疑是专业比赛中相当艰难的项目。
The intense training that Tour de France athletes undergo to race in a three-week-long competition cycling up and down mountains is arguably among the toughest in professional sports.
环法运动员必须在三周内攀山越岭完成赛程，无疑是专业比赛中相当艰难的项目。
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