So, first it's concentric circles that tells us that we have a shape that's a solid of the graph is going to be a surface of revolution. Things don't change if I rotate.
因此，首先它是一些同心圆，这告诉我们,这个图形是一个旋转得到的曲面,当旋转它的时候并没有发生变化。
"We're on the brink of a new lighting revolution," says Jerry Simmons, head of the solid-state lighting programme at America's Sandia National Laboratory.
美国桑地亚国家实验室固态照明项目首脑Jerry Simmons称，“照明技术革新即将濒临”。
Then combined with teaching example, detailed analysis on intersection curve of normal revolution solid is provided, theoretical basis is advanced for computer graphics.
并结合实例，细致的分析了常见的回转体相贯线，为计算机绘图提供了理论依据。
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