Using this method we can calculate the actual city regional fire probability although we only grasp the overall urban fire distribution and regional fire bridge response law.

运用这种方法就可以在只掌握城市总体火灾分布特征和区域消防出动规律的情况下，计算出实际城市区域火灾发生规律。

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In Sichuan, soldiers spent a hard time creeping across Luding Chain Bridge, which was made up of 13 iron chains, in the middle of gun fire.

在四川，士兵们在炮火中艰难地爬过由13条铁链组成的泸定铁桥。

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''Here are the beginnings of fire and engineering, the origins of pyrotechnology, and the bridge to more recent ceramic and metal technology,'' said Mr Brown.

“这是火和工程的开端，古代高温技术的源头，更晚的陶瓷、金属技术的桥梁。”布朗说。

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Authorities have already evacuated between 900 people near the Taylor Bridge Fire, the governor's office said.

CNN: Heartbreaking losses as Western wildfires rage

Washington's Taylor Bridge Fire began as a brush fire Monday afternoon.

CNN: Heartbreaking losses as Western wildfires rage

The Bay Bridge lights will fire up nightly at dusk and turn off at 2 a.m. every night until 2015.

CNN: San Francisco turns a bridge into art with 25,000 lights