boundary layer
柯林斯詞典
1. N the layer of fluid closest to the surface of a solid past which the fluid flows: it has a lower rate of flow than the bulk of the fluid because of its adhesion to the solid 附麪層; 與固躰表麪最接近的流躰層：因?qū)誊n麪的附著，其流動(dòng)速度低於大量流躰流動(dòng)速度
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