草地和泥土小路很不错,但更重要的是表面光滑。
Grass and dirt trails are nice, but a smooth surface is even more important.
将面团取出,揉一分钟左右直至表面光滑。
Pour the dough out and knead it for about 1 minute or until the dough is smooth.
肝脏表面光滑,因血液供应丰富而呈暗红色。
It is glossy in appearance and dark red in color from the rich supply of blood flowing through it.
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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