cat 22222.txt
-9
6
-102
222
grep -E ['-0-9'|200] 22222.txt
-bash: 200]: command not found
grep: 不匹配的 [ 或 [^
-9
6
-102
222
grep -E ['-0-9'|200] 22222.txt
-bash: 200]: command not found
grep: 不匹配的 [ 或 [^
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