泄漏率与表面平滑度和光洁度有关。
The rate of leakage is a function of the smoothness and finish of the surfaces.
研究了提高高光泽度铝箔衬纸表面平滑度的方法。
The way of increasing the smoothness of the high-gloss aluminum foil backing paper was studied.
第二层原因就不是那么明显了，萨洛表示，“外层的硅胶泳帽一般不会起皱，能够更好地保持表面平滑度，减少在水中的阻力。”
The second reason isn't as obvious. According to Salo, "the outer silicone cap better maintains the shape and does not wrinkle as much, thereby causing less drag."
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