the layer of fluid adjacent to a moving body; esp. in Aeronautics, the layer of air adjacent to an aircraft in motion.
| 单词 | θ75304 |
| 释义 | the world > matter > gas > air > [noun] > air above our heads > portion of > layer adjacent to moving body (1) boundary layer1922 the layer of fluid adjacent to a moving body; esp. in Aeronautics, the layer of air adjacent to an aircraft in motion. |
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