Because the surface of the water table is not flat but instead rises and falls with topography, groundwater is affected by gravity in the same fashion as surface water.

由于地下水位不是平面的，而是随着地形起伏的，所以地下水和地表水一样受到重力的影响。

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Recent studies of ancient Maya water management have found that the urban architecture of some cities was used to divert rainfall runoff into gravity-fed systems of interconnected reservoirs.

最近对古玛雅水资源管理的研究发现，一些城市的城市建筑被用来分流降雨径流到相互连接的水库的重力补给系统中。

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Instead, the water moves via gravity.

相反，水自动通过重力移动上来。

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And the idea was that gravity did work on the water and falling, and that work led to the generation of heat.

焦耳的想法是,重力对水，做了功。

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At Purdue University in Indiana, scientists are working on a reactor-like device that uses water circulated by gravity to keep the core cool.

CNN: Today/Tomorrow - Helping nuclear plants keep their cool

New Orleans lies between the lake's water and the Earth's center where gravity wants that water to go.

NPR: Defying Gravity, and Odds, in New Orleans

Hydro dams can be reversed and pump water uphill so that the next day, when gravity pulls the water back down, the turbines spin to make electricity.

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