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@echo off&setlocal enabledelayedexpansion for /f "delims=" %%a in (data1.txt) do ( for %%b in (%%a) do ( set /a n+=1,n%%=20,1/n&&(set str=!str!%%b,)||(echo !str!%%b&set "str=") ) )<nul>date2.txt 2>nul复制代码