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方向比
direction ratio
- 方向比距离更重要。
Orientation is more important than distance. - 这种排列是各向异性的，使波的传播沿一个方向比另一个方向要容易。
That alignment, known as anisotropy, makes it easier for waves to travel in one direction than the other. - 串列叶栅的尾迹平均速度和紊流脉动速度沿额线方向比单列叶栅变化平缓。
Behind the tandem cascades, the variations of mean velocity and turbulence intensity along the tangential direction become more gentle than that behind the single-row cascade.
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