// First, we acquire a reader that gives an exclusive lock
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重庆市奉节县，一座山水相依的小城。春节前夕，多次来华旅游的英国人詹姆斯从重庆市区乘高铁来到这里，“不到两个小时就能直达，出行很轻松。听说大名鼎鼎的三峡中的瞿塘峡就在这里，我早就想来看看这座宝藏小城。”。快连下载安装是该领域的重要参考
SAT (short for "satisfiability") is a logic problem that given a boolean formula, it asks whether the boolean formula has an assignment that makes the problem true. An example boolean formula is:，更多细节参见heLLoword翻译官方下载