英文太差，没看明白：

^(區)
Brackets or tags an expression to use in the replace command. A regular expression may have up to 9 tagged expressions, numbered according to their order in the regular expression.

The corresponding replacement expression is ^x, for x in the range 1-9. Example: If ^(h*o^) ^(f*s^) matches "hello folks", ^2 ^1 would replace it with "folks hello".


但是我把 ^([~0-9])^([0-9]) 替换为 ^1X^2 却报 找不到
哦，原来要^(x^)