结果表明,U型弧底节流孔具有更大的压降和更高的热力学效率。
It is shown that the U-bottom orifice has higher total pressure drop and (thermodynamic) efficiency.
因为从根本上来说,黄金的力学效率取决于黄金与以黄金为基础的信贷之间的比例。
For the mechanical efficiency of gold is, per se its ratio to the credit built on it.
现代运动用滑翔机的机翼长而细薄,拥有最佳的空气动力学效率,其升阻比达到50:1。
A modern sports glider, with long, slender wings, is the most aerodynamically efficient aircraft, with a lift-to-drag ratio of around 50:1.
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