8 4 "用法: %s [-abcDEFGHhIiJLlmnOoPqRSsUVvwxZ] [-A 行数] [-B 行数] [-C[行数]]\n"
9 5 "\t[-e 模式] [-f 文件] [--binary-files=值] [--color=何时]\n"
10 6 "\t[--context[=行数]] [--directories=动作] [--label] [--line-buffered]\n"
11 7 "\t[--null] [模式] [文件名 ...]\n"
13 9 "%s (BSD grep) %s\n"