All of the typical editing commands work as expected, including cut, copy, and paste.

所有常用的编辑命令都按预期运行，包括剪切、复制和粘贴。

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Sed loads lines from the input into the pattern space, applies sed editing commands to the contents of the pattern space, and then writes the pattern space to standard output.

sed将输出中的行加载到模式空间(pattern space)，对模式空间的内容应用sed编辑命令，然后将模式空间写入到标准输出中。

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Sed USES regular expression syntax to search for and replace text selectively in the pattern space as well as to control which lines of text should be operated on by sets of editing commands.

Sed使用正则表达式语法在模式空间中搜索并有选择地替换文本，以及决定对哪些文本行应用编辑命令。

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Commands for editing documents disappear, so you're left with the functions you'd need most, such as defining a word or translating a phrase.

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