由于会在每行至少找到此双字符模式的一个匹配项，因此grep命令会输出输入文件中的每个行。

Because it finds at least one match to its two-character pattern on every line, the grep command outputs every line in the input file.

youdao

由于会在每行至少找到此双字符模式的一个匹配项，因此grep命令会输出输入文件中的每个行。

Because it finds at least one match to its two-character pattern on every line, the grep command outputs every line in the input file.

youdao