在雪地上奔跑的英文表达是 "running on snow." 此表达来源于英语的基本语法结构，即在雪地上进行的动作是 "running"，而这个动作所处的环境是 "on snow." 例句：
The kids were having fun running on snow. (孩子们在雪地上奔跑，玩得很开心。)
It was difficult to run on snow because it was spppery. (在雪地上奔跑很困难，因为雪很滑。)
Running on snow is a great way to stay active in the winter. (在雪地上奔跑是冬天保持活动的好方法。)