Some could be with combining marks, some written in directions other than left-to-right, some with glyph variations of a single character, some requiring character reordering, and so on.

• 有些文字可能有复合的标记，有些可能不是按从左到右的顺序书写，有些对于一个字符有不同符号的变化形式，有些需要字符的重新排序，等等。