89343671

@echo off
setlocal enabledelayedexpansion

set const_str="他娘的"

for /f %%i in (test.txt) do (
    set var=%%i
    echo !var:%const_str:~1,-1%=TND!
)
echo.
echo ======分======割======线======
echo.
for /f %%i in (test.txt) do (
    set var=%%i
    echo !var:%const_str:~1,-1%=!
)

pause