计算结果表明，降低空气入口流速，可减小空气流动阻力，提高多孔墙的集热效率；附加玻璃通道的太阳能多孔墙可减小长波辐射损失，并且具有收集热空气的作用。
Results show that the flow resistance will be decreased and the collection efficiency of the porous solar wall will be increased with a decrease in the inlet air velocity.
飞机上的机翼制造升力超过阻力，但具体取决于机翼的设计和当时经过的空气流动速率。
The aerofoil of a wing creates more lift than drag, but exactly how much depends on its design and the speed of the air passing over it.
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