Sed may combine several lines in the pattern space, and it may write to a file, write only selected output, or not write at all.

Sed可以在模式空间中组合多个行，然后它可能将输出写入到文件中、只写入选择的输出，或者根本不执行写入。

youdao

This filtering may well include deleting headers or trailers from the data file; sed and awk are your friends for any text-filtering requirements.

这可能包括删除数据文件中头尾不需要的信息；sed 和 awk 有助于满足任何文本筛选需求。

youdao

This design change is really handy, because if we want to compile another program instead of sed, we can simply create a new.ebuild file and pass it as an argument to our "ebuild" script.

这种设计更改确实方便，因为如果要编译另一个程序，而不是sed，可以简单地创建一个新的. ebuild文件，然后将其作为自变量传递给“ ebuild ”脚本。

youdao