向此行号加1将得出感兴趣的范围的起始行号，也就是说，具有相同缩进的第一个相邻行就作为当前行。

Adding 1 to this line number gives the start of the range of interest, namely, the first contiguous line with the same indentation as the current line.

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我们还可以使用该命令替换给定行号的缓冲区中的文本，或者删除当前行中第一个出现的字符串。

We can also replace the text in the buffer at a given line number or remove the first occurrence of a string in the current line, using this utility.

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支持“编辑”命令键的自定义：支持行号显示：可以用指定颜色显示当前行：支持文件拖放。

Support the "Edit" command from the definition of the keys: OK, show support: can specify the color that shows the current line: drag and drop support files.

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