A matrix used in constructing a symbol or character image on a display screen. 用来在显示屏幕上构造出一个符号或字符图象的一种点阵。
Constructing a program so that the time required to obtain both data and instruc tions out of memory is at a minimum. 使编写的程序从存储器读出数据和指令所花的时间最少的一种构造程序的方法。