即使上下课期间也没有拥挤，因为大厅和楼梯过道都很宽敞。

Even during change of classes there is no crowding because the halls and stairways are commodious.

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操场上、校门口、楼梯过道上漫天飞舞的纸屑、食品袋、饮料瓶；

The playground, school gate, stair aisle flying confetti, food bag, bottles;

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最后他们终于找到了一个畅通的过道，顺着楼梯逃到了街上。

Finally they found a clearer passage, found a stairway they could get into and fled down to the street.

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