几名刚刚参与枪战的警员一边试图控制局面，一边进行紧急救援，但与此同时，大量路人从四面八方涌入现场。其中一名警员被叫去处理一把掉落在附近的枪支。
def _crawl_detail(self, url: str) - None:
。服务器推荐是该领域的重要参考
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For SAT problems with 10 variables and 200 clauses, it usually output SAT as expected, but the assignment was never valid (Examples: first, second). Once it claimed a SAT formula was UNSAT. For this reason I didn't bother testing with more variables for the SAT case.