We helped set up the school, cleaned it out, and turned the classroom into the surgery room. It was called the "operation theater".

我们帮他们改装学校，打扫环境门将教室变成外科手术室，称为“手术教室”。

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In some places, such as the lobby of a concert hall or theater, a waiting room or a classroom, it is common for strangers to start a conversation even without an introduction.

在有些地方，如音乐厅或剧场的休息室、候车室或教室，陌生人常常甚至不必作介绍彼此就可以开始交谈了。

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In public place: in places and so on station, theater, classroom, store, subway, must maintain calm, chooses hides place, then obeys the direction, the order evacuation.

after在公共场所：在车站、剧院、教室、商店、地铁等场所，要保持镇静，就地选择躲藏处，然后听从指挥，有序撤离。

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