Dome, 圓頂

Jul 11, 2014. A donut shaped canopy hangs in the rotunda of the US Capitol to catch debris during work to repair the interior of the Dome in Washington, DC. (Jim Lo Scalzo—EPA)
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Pictures of the Week: July 4 — July 11 | TIME
http://time.com/2973872/pictures-of-the-week-14/
Dome - Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Dome
圓頂 - 維基百科，自由的百科全書
http://zh.wikipedia.org/wiki/%E5%9C%93%E9%A0%82
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