sealed off

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

该竞场为四周封闭，可以举行斗剑、格斗、斗兽及其他竞赛项目。

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筑的转变，就可能是追求门票收入的开始。

Seal off the edgefold by using a new special heat-pressing technology, enhance prevention of side leakage.

独有的新型热压密封术，更加有效的防止侧漏，使用更加放心。