When the train runs slowly, the aerodynamic forces acting on the box car decreases, which is helpful to the train passing safely the bridge of wind zone.

而列车的减速运行，将使棚车所受到的气动力和倾覆力矩降低，有助于棚车安全通过风区桥梁。

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Wind farm turbines create a Doppler effect as they rotate, creating a potential radar blackout zone.

风力涡轮机在旋转过程中产生多普勒效应，形成一个潜在的雷达中断区。

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To maximize energy output, the tapered towers funnel wind between them, creating a negative pressure zone behind the buildings that draws more air through the gap.

为最大限度发电，在两塔间形成了漏斗形的聚风口，使得在大厦后面形成一个负压区，有利于通过豁口吸入更多空气。

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Fans can wind up in the danger zone, too.

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Called Zone Green, it will promote energy efficiency by making it easier to add photovoltaic panels, wind turbines, greenhouses and shading devices to the roofs and sides of older buildings.

WSJ: Zoning Laws Grow Up | By Julie V. Iovine

Speaking at the same press event, Mr. Van Rompuy said that the recent flare-up of the euro-zone crisis following botched bailout attempts in Cyprus highlighted the need for a European Union plan on how to wind down unviable banks, a crucial step in Europe's quest for a harmonized and shared system of dealing with ailing banks.

WSJ: Europe Financial Woes Dominate Talks With U.S.