The Seniors were told to stop demonstrating on campus.

　　非英语国家的学生能揣摩出三解就已很棒了!

　　第1解：

      (1)The seniors were demonstrating and were asked, on campus, to desist.

      (高年级的学生在示威，校方在校园要求他们停止示威。)

　　第2解：

      (2)The seniors were demonstrating and were asked to desist on campus (although they could demonstrate elsewhere).

      (高年级学生在示威，校方要求他们停止在校园中示威但可在其他地方示威)。

　　第3解：

      The seniors were demonstrating on campus and were asked to desist.

      (高年级的学生在校园示威，校方叫他们停止示威。)

　　第4解：

      People were demonstrating on campus, and seniors were asked to stop them.

      (有人在校园中示威，高年级生被要求去制止他们。)

　　第5解：

      Peoplewere demonstrating and seniors were asked, on campus, to stop them .

      (有人在示威，高年级生在校园中被要求去制止他们。)

　　第6解：

      People were demonstrating and seniors were asked, to stop them from doing so on campus(although they could do it elsewhere)

     (有人在示威，高年级生被要求去制止他们在校园中示威(但他们可在别处示威。)