以下为句子列表：
英文: A computer scientist at UCLA poses by a projected computer image of a skeleton diving headfirst down a staircase at his office.
中文: 加州大学洛杉矶分校一名计算机科学家站在办公室里的一个计算机动画投影旁，画面中一副骷髅沿着楼梯朝下俯冲。
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英文: A greater number of wider staircases better protected against the encroachment of fire and smoke are also likely.
中文: 另外，他们还可能大量增设一种更能阻却火势与浓烟蔓延的楼梯。
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英文: A man who tripped, fell down a staircase and smashed into three rare Chinese vases in a museum two weeks ago said on Monday it was just a regrettable accident.
中文: 两周前，一名男子在博物馆参观时从楼梯上跌倒，将三个珍贵的中国花瓶撞个粉碎。本周一，这名男子说，这只是一场令人遗憾的事故。
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英文: A notched board at either side of a staircase that supports the treads and risers.
中文: 木楼梯侧板，木楼梯小梁在阶梯两边支撑楼梯的踏板和竖板的有凹口的木板
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英文: A vertical support at the center of a circular staircase.
中文: 螺旋楼梯中柱环行楼梯中间的垂直支撑
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