在她们用餐结束前，他们上了一道馅饼，有着华丽、光滑表面的馅饼。

At the end of their ladies' lunch, they were served a tart with a gorgeous, glossy glaze.

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光滑表面会反射一个反向的优选极化波，而粗糙地区的反射波是左旋极化波。

While smooth surfaces send back a reversed, right-polarized wave, rough areas return left-polarized waves.

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在观察蛇在粗糙面表面和光滑表面的爬行之后，纽约大学及另外一些科学家表示蛇爬行的秘密在于它的鳞片。

After watching snakes wriggle up rough fabric surfaces or (less successfully) smooth surfaces, scientists from New York University and elsewhere say the secret is in the scales.

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Somehow, if you could manufacture a really smooth frictionless surface, that if you took a hockey puck or something and an air cushion and you give it a push, in some idealized world, it'll travel forever.

如果你制造一个绝对光滑无摩擦的表面,然后在上面放个冰球或者别的什么,或者气垫,然后推它一下,在理想条件下,它会永远运动下去

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