结果发现，运动员患上呼吸道感染次数较之对照组明显要多，每次患病的平均持续时间明显要长。

The results showed that the times for runners to suffer from upper respiratory tract infections were obviously more than those for the control group.

youdao

结果发现，运动员患上呼吸道感染次数较之对照组明显要多，每次患病的平均持续时间明显要长。

The results showed that the times for runners to suffer from upper respiratory tract infections were obviously more than those for the control group.

youdao