three-legged race

three-legged race
/ˌθri:legɪd ˈreɪs; ˌθri`lɛɡɪd `res/ race
in which competitors run in pairs, the right leg of one runner being tied to the left leg of the other 三足赛跑（参赛者两人一组, 将一人左腿与另一人右腿绑在一起跑）.

牛津英汉双解词典