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.
黄豆答应一声，忙转身进去了。
During that time, Zhao Mucheng had been afraid to sleep for several days in a row. He slept for up to one hour a day. Zhao Mucheng was lying in bed when he killed Baud.
只要她出面作证，谁真谁假就清楚了。
Setting position, configuration type (referring to portable type, cart type, etc.), quantity, production date and drug replacement date.
2.1 Advantages
To provide a consistent interface for a set of interfaces in the subsystem, Facade mode defines a high-level interface, which makes the subsystem easier to use.
在西楚国做人质的时间不短了，他们都学会了沉默了察言观色，见到父母心情不好，全都不敢说话。
小说和电视剧一起连载。
如果你问科迪·马沃里克，谁是“大Z”啊？那么你算是问对人了……哦，抱歉，是问对企鹅了。科迪是一只年轻的跳岩企鹅，而“大Z”就是他的偶像，一位传奇的冲浪运动员。然而在10年前的最后一场冲浪比赛中，他却消失在海浪里，再也没有回来，所有人都认为他死了。就是在那场比赛中，是科迪第一次见到“大Z”，随即就被这位传奇冲浪手的风采所倾倒，疯狂地爱上了冲浪运动。
Suddenly the captain told us to hide. He saw the raft floating back again. Because the umbrella anchor was placed before, the impact of the current was increased, and the fishing boat drifted forward and caught up with the raft.
Civil Aviation Flight Students
·影片的导演爱德华·麦克亨利和罗里·麦克亨利是兄弟俩。这是他们第一次拍摄动画长片。
板栗不禁哑然。
…
一边饮用，一边两眼上翻，眼珠骨碌转动，往四下里扫描，严密注视着周围的动静。
