英语翻译

问题描述:

英语翻译
With a span of 20 meters like one of the inferior arches of the lower level of the ancient bridge that is classified as a World.Heritage site by Unesco(应该全是大写的联合国教科文组织),added the architect.哪位大虾帮我看看啊,大概给我讲下就是了,

大意:
跨度为20米,就像被联合国教科文组织确认为世界遗产的那座古桥下层拱桥的内部一样.