A nuclear blast is an explosion with intense light and heat, a damaging pressure wave, and widespread radioactive material that can contaminate the air, water, and ground surfaces for miles around.

核爆炸会释放出高能量的光和热，破坏力巨大的压力波，而且四处飘散的放射性物质会污染数周围英里内的空气，水，和地表。

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Operating weight and ground contact pressure can be adjusted by filling water or wet sand with greater adjusting scope.

通过加水或湿沙可调节压路机配重和接地比压，调节方便范围大；

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The observation results of the bridge head experimental site of Jialichen Bridge are analyzed such as vacuum degree, ground water table, flowrate, pore water pressure and surface settlement.

通过对浃里陈大桥桥头试验段的真空度、地下水位、流量、孔隙水压力、地表沉降等现场监测结果的分析；

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These valves use a screw type valve instead of a simple flap, and they have a pressure regulating mechanism that will vent water to the ground if the intake pressure exceeds a set level.

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The superintendent of the Pecos Valley Artesian Conservancy District, Dennis Karnes, can still remember sitting on a well-pipe as a boy and being launched into the duckpond as soon as the farmer opened the valve and natural pressure spewed several thousand gallons a minute of ground water against his legs.

ECONOMIST: The Pecos river

High demand for water amid the heat wave and problems with soil shrinking as the ground warms has resulted in burst pipes and low water pressure in Oklahoma City, prompting officials to issue mandatory water-use restrictions for the first time in at least a decade, according to utilities department spokeswoman Debbie Ragan.

CNN: Heat advisories issued to states dwindles to 15