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宝马正与欧盟谈判，为中国产MINI车型寻求关税豁免，推荐阅读快连下载安装获取更多信息
I spent weeks with Alexa on the Echo Show 11, and it was awesome (until I started fact-checking)
this isn’t just an academic curiosity. flip the alternation order to (ab|a)+ and suddenly PCRE matches the entire string! the | operator in backtracking engines is ordered - it’s not union, it’s “try left first”. the order of branches changes the result, which means | is not commutative. a|b and b|a can give different matches.