round robin

名词 round robin:

1. a tournament in which every contestant plays every other contestant
2. a letter signed by a number of people

1. The people in our neighborhood are sending a round robin to the Air Force to protest the nice the jet planes make flying over our house.
   我们这一带的居民在向空军部队递交一份有环形签名的抗议书，就喷气式飞机飞越我们住宅上空时产生的噪音问题提出抗议。