ultramarathon

For nearly 20 years, Kouros has been at the top of the extreme sport of ultramarathon running.

几乎有20年的时间，柯罗斯在超级马松种极限竞中名列前茅。

The Soochow ultramarathon is unique in that its runners are confined to running around a 400-m track for a full 24 hours.

东吴大学超级马松独特之处，在于者被局限在400米的道24个小时。