render float and set 三层涂抹
While you are on a site, hit the markup.io button on your browser bookmarks toolbar and it will float a set of drawing tools one that page.
当您打开某个网页时，只需点击一下浏览器收藏夹工具栏(上的markup . io小书签图标)，一个涂写工具框就会浮现在网页上。
The Mandelbrot set is infinitely deep and complex at all scales, but a float or a double can go only so deep before losing the ability to distinguish adjacent points.
Mandelbrot集合在各个级别上都是非常细微和复杂的，但是float或double可以在失去区分相邻点的能力之前达到这个细微的级别。
Press Add, set the name to support and select FLOAT as type.
按下add，将名称设为support，类型设为FLOAT。
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