题目

英语翻译
有两组运动员,给第一组每天都吃那能量棒,不给第二组吃,研究两组运动员的跑步水平是否会提高.
如果第一组运动员中的一人是第二组运动员中一人的朋友,第二组就会知道第一组每天都吃能量棒,而自己这一组没有,但是他们不想就这么输掉,每天都很努力练习,结果两组的速度都变快了.这个实验就分不清能量帮是否有效.

提问时间：2020-12-05

答案

楼上的英语?
In two teams of athletes,we supply one team (Team A) with energy bar for diet but not for another team (Team B).It is to find out whether the standard of jogging these teams of athletes can be improved?
If one of the athletes from Team A is a friend of the Team B,then the Team B will know that Team A has energy bar daily,but not for their team.In this case,Team B will work harder everyday in order not to loose out.Eventually,both teams will improve their speed in jogging etc..This experiment hence can't distinguish whether the energy bar has to do with the improvement of the speed.