这主要原因是圣地亚哥是建立在槽状凹陷的两条山脉间的城市，这是一座陷入空气污染并要防止其扩散的城市。

That is largely because greater Santiago is built in a trough-like depression between two mountain ranges, which traps polluted air over the city and prevents its dispersal.

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《钻石DA42M护卫者号》飞机装备着特殊的空气采样系统，它的上任有助于精确绘制出欧洲上空的火山灰云层图，目前整个欧洲航空业由于冰岛的火山爆发已经陷入一片混乱。

The Diamond DA42M Guardian is being kitted out with a special air sampling system to help accurately map the cloud that is causing chaos to air travel across Europe.

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不料，一道眩目的光划过天边，炽热无比的空气，以迅雷不及掩耳的速度，把建筑物夷为平地，市中心顿时陷入一片火海。

Then a blinding flash lit up the sky. Superheated air rushed at tremendous speed, knocking down buildings and setting the center of the city ablaze.

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