refereeing

We only lost the game because the referee was biased.

我们输掉了比赛就是因为裁判员偏袒对手。

She gave her college tutor as her referee to the interviewer.

她提交给面试官的推荐人是其大学导师。

They had to ask one of the spectators to referee (the match).

他们只得从观众中请出一人来担任（比赛的）裁判。