48. Reader: (1) An abridged term for "proofreader" who checks proofs for accuracy. (2) Device which can "read" from magnetic media or, in the case of OCR, from typescript.
But if I want to use a matrix, it's like there's a hierarchy where you might have groups of objects like this whole text is a group of characters within.
，（2）阅读器:（1）核
，确定其正确无误
人
置，或在光学字符识系统内，能阅读文字
想使用矩阵，
像
有一个层级结
，你可能会有一组对象，比
