a very common use case for regexes is to find matches that are preceded or followed by some context. a classical example being all lines that end with ‘a’. this requirement is usually expressed with a lookahead, where upon finding an ‘a’, you look ahead to check if it’s the end of the line. in a backtracking engine, this is very easy to implement - you just duct-tape the logic that checks the next character, but in a DFA-based engine, this is impossible because you cannot report “the match is here” if the next character is not even known yet. and by the time you know the next character, the position information is lost, so you can’t report the match retroactively (well, unless the distance is fixed of course..).
В МИД Эстонии пояснили, что речь идет о перемещении ледокола «Мурманск», который 28 февраля направился в Финский залив для освобождения из ледового плена танкера Olympic Friendship.，详情可参考heLLoword翻译官方下载
，推荐阅读体育直播获取更多信息
财报显示，截至2025年9月末，工、农、中、建行的总资产分别为52.81万亿、48.14万亿、37.55万亿、45.37万亿，对比之下，邮储银行18.61万亿的身躯显得过于清瘦。，更多细节参见体育直播
据「Tom’s Hardware」报道，英伟达 CEO 黄仁勋近期在最新的电话财报会上发出预警，称未来几个季度，消费级游戏显卡将面临严重的供应短缺。