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”。
Revolution surface is most often used in solid modeling system.
在立体造型系统中，旋转曲面是最常用的曲面。
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