set aa=hello,world!
echo before:%aa%
echo after:%aa:world=china%
echo aa=%aa%
echo %aa%
set aa=%aa:world=china%
echo aa=%aa%
微信扫一扫
set aa=hello,world!
echo before:%aa%
echo after:%aa:world=china%
echo aa=%aa%
echo %aa%
set aa=%aa:world=china%
echo aa=%aa%
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