Here you see the outline of a letter, the cap H, which is the thin black line, the contour, which is how it is stored in memory, superimposed on the bitmap, which is the grey area, which is how it's displayed on the screen.
这里你们看到字母的轮廓， 大写的H， 细黑线是它的轮廓， 这也是它在存储器里的样子， 叠加在点阵字体上， 即灰色区域， 这就是它在屏幕上显示的样子。