通常向前扫描字符串比反向扫描更安全。
It is usually safer to scan a string forward rather than in reverse.
本文提出了一种新的电视扫描字符发生器的设计方法。
This paper proposes a new method for designing TV scanning character generators.
绘描字体：美术设计名词。指先勾描字体轮廓，然后填色。
Built-up letter: Graphic term for a letter which is first drawn and filled in after.
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