The action of wind and water can form cave openings like natural rooms within the rock.

VOA: special.2009.07.20

Those are two continuous strands that wind around each other to form the double helix.

这两股主链,相互缠绕形成双螺旋

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He supports clean energy, just not in the form of wind turbines off the coast of Cape Cod.

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The second straw in the wind came in the form of an October 14 op-ed in the Washington Times by Tom Donahue, president of the U.S. Chamber of Commerce.

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The wind gains strength from the thermal energy of the ocean, eventually condensing vapors and circulating air fast enough to form high-speed wind and heavy rain.

CNN: graphic