A plane graph together with the set of faces it determines is called a plane map.

一个平面图与它所确定的面的集的总体称为一个平面地图。

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We'll be slicing things by a plane that is now in the direction of this vector,u and we'll be looking at the slope of the slice of the graph.

用沿着向量方向的平面,切开图像,然后看图像的剖面图，找出斜率。

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And, in terms of a graph, they correspond to slicing by a plane that's parallel to one of the coordinate planes, so that we either keep x constant, or keep y constant.

从图像上看，它们对应于,用平行于坐标轴的平面横截图像得到的，过程中保持x或y恒定。

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And, as Euler's successor, Carl Friedrich Gauss, was to discover, if you plot real numbers on one axis of a graph and imaginary ones on the other, you create a plane that represents both sorts of numbers.

ECONOMIST: Beno?t Mandelbrot