That must be the oval unroofed amphitheater in Rome. It was basically a stadium with comprehensive functions.
就是罗马的椭
型露天竞技场
，
上是综合功能的体育场。
That must be the oval unroofed amphitheater in Rome. It was basically a stadium with comprehensive functions.
就是罗马的椭型露天竞技场，上是综合功能的体育场。
The change from the unroofed stadiums to sealed off buildings maybe the beginning that tickets were sought.
从露天场馆到封闭的建筑的转变，就可能是追求门票收入的开始。
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