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In the system, how do we need to reuse an object, if we repeatedly use the new operator to create the object at this time, it is a great waste of system resources. Since we use the same object every time, why can't we share it? This is also the reason why the model of enjoying yuan appears.Now, let's imagine why these "checkpoints" are called "chains" in iptables. As we know, The purpose of a firewall is to match "rules" for passing messages, Then execute the corresponding Action, So, when the message passes through these checkpoints, You must match the rules on this level, However, there may be more than one rule on this level, But there are many rules, When we put these rules in a chain, A "chain" has been formed. Therefore, we imagine each "checkpoint" as shown in the following figure. In this way, it is more appropriate to call them "chain". Each message passing through this "checkpoint" must match all the rules on this "chain". If there are qualified rules, the corresponding actions of the rules will be executed.周菡头也不抬，只顾揉捏他脚板。《外貌至上主义》讲述了全校最丑胖的男生文帅在原学校备受欺负后鼓起勇气转学，却在一夜之间拥有了两具迥然不同的身体！一具是原先丑胖的自己，可另一具竟然是颜值爆表的完美男神，文帅发现自己的思维可以在两具身体中任意切换，当一副身体清醒另一副则会进入睡眠状态 … 两具身体的秘密使文帅原先的生活发生了天翻地覆的变化，受到了从未有过的欢迎，开始了完全不同的生活，感受到“金字塔顶”人生的美妙和便利，与此同时，这幅帅气身体隐藏着巨大秘密逐渐浮出水面，帅气身体原本的主人 kris 逐渐苏醒，层层谜团逐渐解开。　　"还以为是古董呢，原来是宝物？！”　　挖地做生意的盗墓贼来了！　　姜东九（李帝勋饰）是天生的盗墓贼，他只要闻到土味就能找到宝物。　　他遇到了自称是韩国印第安纳·琼斯的古墓壁画盗墓专家琼斯博士（赵宇镇饰）、传说中的铁锹达人（林元熙饰），组建了梦幻般的团队，培养了危险又刺激的盗墓版图。　　另外，了解他才能的美术界精英馆长尹室长（申惠善） 向姜东九提议了既有魅力又危险的交易...！　　黃嶺寺金铜佛像，高句丽古墓壁画，还有首尔江南中心宣陵！　　越卖越大的盗墓世界！　　不同级别的铲子开始了！残念生物事典残念生物事典残念生物事典残念生物事典残念生物事典在收集定义过程中，他们发现了一个叫W.C.迈纳（西恩·潘饰演）的医生独自贡献了一万多条引语，这是一个专业语言学者都很难完成的工作量。当编委会决定向他致敬时，一个惊人的事实曝光了：原来迈纳医生，是美国内战时期部队的一个军医，因为患有精神分裂症而犯杀人罪，被禁闭在精神病院，是一个被认为是疯子的人。