The secret service agents hustled the speaker out of the amphitheater.

特务机关的代理人把演讲者驱逐出。

That must be the oval unroofed amphitheater in Rome. It was basically a stadium with comprehensive functions.

那就是罗马的椭圆型露天了，基本上是综合功能的体育。

The amphitheater was a sealed off round structure. Swordplay, wresting, gladiatoral and other contests were held there.

该为四周封闭式结构，可以举行斗剑、格斗、斗兽及其他赛项目。