我们选择进行越野赛跑。

We chose to do cross-country running.

光化学氧化剂一直与健康的越野赛跑运动员的成绩下降有关。

Photochemical oxidants have been associated with impaired athletic performance in healthy cross-country runners.

观看他们的比赛感觉棒极了，无论是击剑还是越野赛跑，美式足球还是篮球。

Wathching an Ivy League game is wonderful, whether it's fencing, cross-country running, American football or basketball.